Subjects

Sections | |||
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Spontaneous Reaction | 10 mins | 0 completed | Learn |

First Law of Thermodynamics | 6 mins | 0 completed | Learn Summary |

Entropy | 58 mins | 0 completed | Learn Summary |

Gibbs Free Energy | 30 mins | 0 completed | Learn |

Additional Practice |
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Boltzmann Equation |

Additional Guides |
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Second and Third Laws of Thermodynamics |

Solution: When temperature is increased and pressure is held fixed across a phase change which of the following statements is true?
A. Entropy is negative and enthalpy is positive.
B. Entropy is negative and

When temperature is increased and pressure is held fixed across a phase change which of the following statements is true?

A. Entropy is negative and enthalpy is positive.

B. Entropy is negative and enthalpy is negative.

C. Entropy is positive and enthalpy is positive.

D. Entropy is positive and enthalpy is negative.

Which of the following has the smallest molar entr...

When an aqueous solution containing Al 3+ at 25°C ...

Which of the following processes result(s) in an i...

For the dissociation reaction of the acid HF
HF ⇌...

Consider the reaction of N2O5 at 25°C for which th...

One of the major sources of NOx compounds in our a...

Which one of the following reactions is most likel...

Which one of the following reactions is likely to ...

Ce2(SO4)3 becomes less soluble in water as tempera...

For which of these processes is the value of Δ S e...

In which process is entropy decreased ?
a) dissol...

The diagram below shows the variation in entropy w...

For which reaction, carried out at standard condit...

Which of the following has the greatest entropy, S...

Consider the following reaction at constant P. Use...

Which of these species has the highest entropy (S°...

Which responses include all of the following proce...

Which of the following processes would have a posi...

Determine ΔS° for the reaction SO3(g) + H2O(l) → H...

Elemental boron can be forrmed by reaction of boro...

Identify the change in state for which there is an...

Which of the following processes is accompanied by...

Calculate the normal boiling point of chloroform g...

Place the following in order of increasing molar e...

Consider the following reaction at constant P. Use...

Calculate ΔS°rxn for the following rreaction. The ...

Identify the change in state that DOES NOT have a...

In which example does entropy increase?
I. A piec...

Which of the following processes shows a decrease ...

Predict which substance in each pair has the great...

Which of the following would probably have a posit...

Predict the sign of ΔS for each of the following:
...

Place the following in order of increasing molar e...

Consider the following reaction at constant P. Use...

Calculate the standard entropy of fusion of ethano...

Calculate the change in the standard entropy of th...

Consider the reaction of N2O5 at 25°C for which th...

Calculate ΔS°rxn for the following reaction. The S...

A system releases 900 J of heat to the surrounding...

HI has a boiling point of –35.4 oC with a standard...

Which of the following reaction(s) is/are predicte...

Benzene has a ΔHvap = 33.90 kJ/mol and a ΔSvap = 9...

The compound benzoic acid, C6H5COOH, melts at 122....

Consider the following figure of four processes fr...

Balance the following reaction and then solve for ...

Explain the following plot:

Of the following descriptions, how many (the total...

Consider the following processes (Treat all gases ...

For which process is the entropy change per mole t...

Which of the following processes have a positive e...

Which of the following would have the highest va...

Which of the following statements describes situat...

Would you expect the entropy of the system to inc...

When temperature is increased and pressure is held...

Coal is a major source of energy that can be conve...

Which of the following reactions would be entropic...

Arrange the following substances in the order of i...

Which of the following statements describes situat...

Consider the following processes (at 298 K) given ...

Consider the following reaction at constant pressu...

Predict the sign on ΔS° for the following reaction...

Rank the standard molar entropy of the following f...

Would you expect the entropy of the system to inc...

When most elastomeric polymers (e.g., a rubber ban...

For which of the following processes does the entr...

Predict the sign of the entropy change of the syst...

The accompanying diagram shows how the free energy...

In chemical kinetics, the entropy of activation ...

Predict which member of each of the following pair...

Predict which member of each of the following pair...

Which process has the larger entropy change: melti...

Predict which member of each of the following pair...

Predict which member of each of the following pair...

In each of the following pairs, which compound wou...

In each of the following pairs, which compound wou...

For each of the following pairs, predict which sub...

For each of the following pairs, predict which sub...

For each of the following pairs, predict which sub...

For each of the following pairs, predict which sub...

Why does the entropy of a gas increase when it exp...

What happens to the entropy of a sample of matter ...

How does the standard entropy of a substance depen...

How does the standard entropy of a substance depen...

How does the entropy of the system change when a s...

Entropy increases with increasing temperature.W...

How does the molar entropy of a substance change w...

Methanol (CH3OH) can be made by the controlled oxi...

How can you calculate the standard entropy change ...

If energy can flow in and out of the system to ...

True or false: An endothermic process increases th...

Predict how the entropy of the substance is affect...

For the following questions circle the correct ans...

Why does the solubility of NaCl only increase slow...

Consider the following reaction at 298 K2Al (s) + ...

Using the following data, calculate ΔSfus and ΔSva...

Which of the following species has the highest ent...

CO(NH2)2(aq) + H2O(l) → CO2(g) +2NH3(g) ΔS° = +354...

Which of the following reactions have a positive Δ...

ΔS is positive for the reaction _________________....

HI has a normal boiling point of -35.4°C, and its ...

The enthalpy of vaporization of acetone is 31.3 kJ...

The ΔH°vap for pure water is 40.65 kJ/mol. Calcula...

The enthalpy of vaporization of methanol is 35.27 ...

Which of the following statements describes situat...

Predict the sign of the entropy change, ΔS°, for e...

HI has a boiling point of –35.4°C with a standard ...

Which of the following reactions have a positive d...

How many of the following processes represent an i...

The thermodynamic quantity that expresses the degr...

Which one of the following processes produces a de...

ΔS is positive for the reaction _______.
a. CaO(s...

For one mole of substance at a given temperature, ...

Which of the following reaction(s) is/are predicte...

Nitric oxides, NO and NO2, contribute to air pollu...

Which of the following phase changes is correctly ...

What are the signs for the change in enthalpy and ...

Which of the following processes involves a decrea...

Which reaction is/are predicted to have a negative...

Predict how the entropy of the substance is affect...

Calculate ΔS∘rxn for this balanced chemical equati...

Given the standard entropy values in the table bel...

Predict how the entropy of the substance is affect...

Using the data in the table, calculate the standar...

Given the values of ΔH∘rxn, ΔS∘rxn, and T below, d...

Determine the sign of ΔSsys in each of the followi...

Determine the sign of ΔSsys in each of the followi...

Determine the sign of ΔSsys in each of the followi...

Determine the sign of ΔSsys in each of the followi...

Determine the sign of ΔSsys in each of the followi...

Determine the sign of ΔSsys in each of the followi...

Without doing any calculations, determine the sign...

Consider two processes: sublimation of I2 (s) and ...

Predict the sign of the entropy change for the fol...

Predict the sign of the entropy change for the fol...

Predict the sign of the entropy change for the fol...

Predict the sign of the entropy change for the fol...

Predict the sign of the entropy change for the fol...

Predict the sign of the entropy change for the fol...

Write the balanced chemical equation for the combu...

Write the balanced chemical equation for the combu...

Predict the sign of ΔS surr for the following proc...

Predict the sign of ΔS surr for the following proc...

Predict the sign of ΔS sys for the process: (a) A ...

Predict the sign of ΔS sys for the process: (b) Si...

Predict the sign of ΔS sys for the process: (c) De...

Predict the sign of ΔS sys for the process: (a) Ga...

Predict the sign of ΔS sys for the process: (b) Ho...

Predict the sign of ΔS sys for the process: (c) Hu...

Predict the sign of ΔS sys for the process: (a) Al...

Predict the sign of ΔS sys for the process: (b) A ...

Predict the sign of ΔS sys for the process: (c) Pe...

Predict the sign of ΔSsys for the following proces...

Predict the sign of ΔSsys for the following proces...

Predict the sign of ΔSsys for the following proces...

Without using Appendix B, predict the sign of ΔS° ...

Predict the sign of sys for each of the following ...

Without using Appendix B, predict the sign of ΔS° ...

Without using Appendix B, predict the sign of ΔS° ...

Predict the sign of ΔS for each process.(a) the bo...

Without using Appendix B, predict the sign of ΔS° ...

Without using Appendix B, predict the sign of ΔS° ...

Which of the following processes have a ΔS > 0?...

Without using Appendix B, predict the sign of ΔS° ...

Predict the sign of ΔS° for each of the following ...

Without using Appendix B, predict the sign of ΔS° ...

Predict the sign of ΔS° for each of the following ...

Without using Appendix B, predict the sign of ΔS° ...

Predict the sign of ΔS° for each of the following ...

Consider these three changes in the possible distr...

Without using Appendix B, predict the sign of ΔS° ...

Predict the sign of ΔS° for each of the following ...

Which of the following reactions (or processes) ar...

Predict the sign of ΔS° for each of the following ...

Predict the sign of ΔS° for each of the following ...

Predict the sign of ΔS° for each of the following ...

Which reaction is most likely to have a positive Δ...

Predict the sign of ΔS° for each of the following ...

Without using Appendix B, predict the sign of ΔS° ...

Without using Appendix B, predict the sign of ΔS° ...

Without using Appendix B, predict the sign of ΔS° ...

Predict the sign of ΔS for the process: C 2H5OH(g)...

Predict the sign of ΔS for the process: N 2(g) (29...

Predict the sign of ΔS for the process: O 2(aq) (3...

When heated, the DNA double helix separates into t...

Predict the sign of ΔS for the process: O 2(g) (1....

Predict the sign of ΔS for the process: Cu(s) (350...

Predict the sign of ΔS for the process: Cl 2(g) (1...

Predict the sign of S accompanying reaction on the...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Does the entropy of the system increase, decrease,...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Without doing any calculations, determine the sign...

Which process will decrease entropy?
a. SO2(l) → ...

Given the values of ΔH∘rxn, ΔS∘rxn, and T below, d...

Entropy is a measure of
a. free energy
b. the he...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

Rank the contents of the following containers in o...

Rank the following substances in order of decreasi...

Arrange the following set of systems in order of i...

Arrange the following set of systems in order of i...

Arrange the following set of systems in order of i...

Indicate which substance in the given pair has the...

Indicate which substance in the given pair has the...

Indicate which substance in the given pair has the...

Which of the following involve an increase in the ...

Arrange these gases in order of decreasing standar...

Arrange these gases in order of decreasing standar...

For each of the following pairs of substances, whi...

Arrange the gases – F2, Ar, and CH3F – in order of...

For each of the following pairs of substances, whi...

For each of the following pairs of substances, whi...

For each of the following pairs, which substance h...

For each of the following pairs, which substance h...

For each of the following pairs, which substance h...

Predict which substance has greater molar entropy....

Predict which substance has greater molar entropy....

Predict which substance has greater molar entropy....

Predict which substance has greater molar entropy....

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Without consulting Appendix B, arrange the group i...

Kyanite, sillimanite, and andalusite all have the ...

Rank each of the following in order of decreasing ...

Rank these systems in order of decreasing entropy....

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

Predict which member of each of the following pair...

For each pair of substances, choose the one that y...

Predict which member of each of the following pair...

For each pair of substances, choose the one that y...

Predict which member of each of the following pair...

For each pair of substances, choose the one that y...

Predict which member of each of the following pair...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each of the following pairs, predict which sub...

For each pair of substances, choose the one that y...

For each of the following pairs, predict which sub...

For each pair of substances, choose the one that y...

For each of the following pairs, predict which sub...

For each pair of substances, choose the one that y...

For each of the following pairs, predict which sub...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

For each pair of substances, choose the one that y...

Calculate ΔSfus and ΔSvap for Na.

At room temperature, the entropy of the halogens i...

The diagram shows the variation in entropy with te...

The diagram shows the variation in entropy with te...

A reaction that occur in the internal combustion e...

Ethene (C2H4) can be halogenated by the following ...

Ethene (C2H4) can be halogenated by the following ...

Calculate ΔS°298 for the following change.(a) SnCl...

Calculate ΔS°298 for the following change.(c) Cu(s...

Determine the entropy change for the combustion of...

Determine the entropy change for the combustion of...

Using the relevant S°298 values listed in Appendix...

Using the relevant S°298 values listed in Appendix...

From the following information, determine ΔS°298 f...

Use the standard entropy data in Appendix G to det...

In photosynthesis, plants form glucose (C6H12O6) a...

Consider the following reaction: 2NOBr(g) ⥫⥬ 2NO...

Calculate ΔS˚rxn for the balanced chemical equatio...

Use standard entropies to calculate ΔS˚rxn for the...

Predict the sign of ΔS° and then calculate ΔS° for...

For the reactionCS2 (g) + 3O2 (g) → CO2 (g) + 2SO2...

For the following reaction, predict the sign and f...

For the following reaction, predict the sign and f...

Find ΔS°rxn for the combustion of ethane (C2H6) to...

Find ΔS°rxn for the combustion of ammonia to nitro...

Find ΔS°rxn for the formation of Cu 2O(s) from its...

Find ΔS°rxn for the formation of HI(g) from its el...

Use data from Appendix IIB in the textbook to calc...

Use data from Appendix IIB in the textbook to calc...

Use data from Appendix IIB in the textbook to calc...

Use data from Appendix IIB in the textbook to calc...

Use data from Appendix IIB to calculate ΔS˚rxn for...

Use data from Appendix IIB to calculate ΔS˚rxn for...

Find ΔS°rxn for the formation of CH3OH(l) from its...

Use data from Appendix IIB to calculate ΔS˚rxn for...

Find ΔS˚ for the formation of CH3Cl(g) {
m CH}_3{
...

Find ΔS˚ for the reaction between nitrogen gas and...

Consider the following reaction:H2O(g) + Cl 2O(g) ...

For the gaseous reaction of carbon monoxide and ch...

“Thermite” reactions have been used for welding me...

By calculating ΔSuniv at each temperature, determi...

Calculate ΔSsurr for the following reactions at 25...

Calculate ΔSsurr for the following reactions at 25...

Determine the normal boiling point (in kelvin) of ...

Ethanethiol (C2H5SH; also called ethyl mercaptan) ...

For mercury, the enthalpy of vaporization is 58.51...

Given the data, calculate ΔSvap for each liquids. ...

For ammonia (NH3), the enthalpy of fusion is 5.65 ...

The enthalpy of vaporization of ethanol is 38.7 kJ...

For rubidium ΔH°vap = 69.0 kJ/mol at 686°C, its bo...

Given the thermodynamic data below, calculate ΔS a...

Consider the reaction between nitrogen and oxygen ...

Calculate the change in entropy that occurs in the...

Calculate the change in entropy that occurs in the...

Calculate ΔSsurr at the indicated temperature for ...

Calculate ΔSsurr at the indicated temperature for ...

Calculate ΔSsurr at the indicated temperature for ...

Calculate ΔSuniv for the formation of Cu2O(s) from...

Calculate ΔSuniv for the formation of HI(g) from i...

If the normal boiling point of a liquid is 67 oC, ...

Calculate the boiling point of benzene, C6H6 from ...

Calculate ΔSuniv for the formation of CH3OH(l) fro...

Given the values of ΔH˚rxn, ΔS˚rxn, and T, determi...

Calculate ΔSuniv for the formation of N2O(g) from ...

Calculate the entropy change for the vaporization ...

Given the values of ΔH˚rxn, ΔS˚rxn, and T, determi...

Given the values of ΔH˚rxn, ΔS˚rxn, and T, determi...

Iron melts at 1535°C and its enthalpy of fusion is...

The boiling point of chloroform, CHCl 3, is 61.2°C...

Calculate the change in entropy that occurs in the...

When does entropy increase and when does it decrea...

The heat of vaporization of methanol, CH3OH, is 35...

Indicate whether each statement is true or false.U...

Estimate whether the entropy of the system increas...The element gallium (Ga) freezes at 29.8°C, and it...Predict which of the following compounds follow Tr...

Predict how the entropy of the substance is affect...

Predict the sign of the entropy change, ΔS°, for e...

Rank the following compounds in order of increasin...

For a given compound, list the decreasing order of...

Select the molecule with the highest gas-phase abs...

Entropy decreases when NO(g) is oxidized by O2(g) ...

Consider the following reaction at 298 K:2C (graph...

Calculate ΔS°rxn for the following reaction:4Cr(s)...

A favorable entropy change occurs when ΔS is posit...

Predict the sign of the entropy change, ΔS°, for t...Which of the following would have the highest entr...

Without referring to a data table, rank the follow...

Consider the following reaction at 298 K:2 H2 (g) ...

Which of the following is true for an endothermic ...

Rank these systems in order of decreasing entropy....Given the values of ΔHºrxn, ΔSºrxn, and T below de...

Consider the following reaction at 298 ºK: C(graph...

The normal boiling point of ethanol (C2H5OH) is 78...A 15 g piece of metal (138.4 g/mol) melts at 1774 ...

Consider the reaction: I2 (g) + Cl2 (g) → 2ICl (g)...The temperature of a 874 g piece of granite is inc...The ΔHvapo of a certain compound is 13.08 kJ mol-1...

Using the data in the table, calculate the standar...Calculate the standard entropy change for the foll...Nitric oxides, NO and NO2, contribute to air pollu...

Consider the reaction:3 Fe2O3 (s) + H2 (g) → 2Fe3O...Entropy of Reaction for Nitrogen Dioxide Formation...Calculate the standard entropy change for the foll...The ΔHvap of a certain compound is 28.26 kJ mol an...Suppose a heat source generates heat at a rate of ...Given the hypothetical reaction. 4 X(s) + 6Y(s) → ...Part BCalculate the standard entropy change for th...

Calculate the standard entropy change for the foll...Use the data from this table of thermodynamic prop...Calculate ΔS° compositefunction (in J/mol • K) for...

Using the following data, calculate ΔSfus (J•K -1•...

Using the following data, calculate ΔSfus and ΔSva...The ΔHvap of a certain compound is 48.17 kJ mol-1 ...Which of the following processes shows a decrease ...

Use the data from this table of thermodynamic prop...A reaction had ΔH°rxn = - 130 kJ and ΔS°rxn = 316 ...Calculate the standard entropy change for the foll...

Calculate the standard entropy change for the foll...Calculate the standard entropy change for the foll...Identify the process in which the entropy increase...The entropy of 0.002 mole of CH2CI2 (aq) is greate...Entropy is a measure of a. free energy. b. the hea...The entropy of 0.5 mole LiBr (s) at 290 K is great...Place the following in order of increasing standar...Which provides the greatest decrease in entropy?Sodium reacts violently with water according to th...The entropy of 1 mole of N2 (g) is greater than th...

Which of the following reactions have a positive Δ...

Calculate the standard entropy change for the foll...

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