The compound benzoic acid, C6H5COOH, melts at 122.4 ̊C. If the enthalpy of fus...

Which of the following reaction(s) is/are predicted to have favorable ∆S ̊rxn?...

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

Which statement is correct? a) Heating always decreases the entropy of a syst...

What are the signs of ∆Ssurr, ∆Ssys, and ∆Suniv, respectively, for a spontaneo...

What would be the signs of ∆H and ∆S for the reaction AB4(g) → AB3(g) + B(g) ...

A system releases 900 J of heat to the surroundings, which are at a constant 2...

Calculate the standard entropy of fusion of ethanol at its melting point 159 K...

Which of the following would probably have a positive ∆S value? 1. O2(g) → O2...

In which example does entropy increase? I. A piece of fruit freezes in liquid...

Calculate the normal boiling point of chloroform given that the standard entro...

Predict the sign on ΔS° for the following reactions i. 2 KClO4 (s) → 2 KClO3(...

Which of the following are always true for spontaneous processes: I. ΔSuniver...

Of the following descriptions, how many (the total number) would increase entr...

How many of the following processes represent an increase in entropy: * Water...

Balance the following reaction and then solve for the ∆S (J/K-mol) for this re...

Benzene has a ΔHvap = 33.90 kJ/mol and a ΔSvap = 96.4 J/mol-K. What is the vap...

HI has a normal boiling point of -35.4°C, and its ΔHvap is 21.16kJ/mol. Calcul...

Which of the following species has the highest entropy (S°) at 25°C? A. MgCO3...

Rank the following compounds in order of increasing entropy at 25°C? A. MgCO3 ...

Which of the following are the thermodynamic signs for the mixing of a gas wit...

HI has a normal boiling point of -35.4 oC and its ΔHvap is 21.16 kJ/mol. Calcu...

Which of the following phase changes is correctly paired with the sign of its ...

Would you expect the entropy of the system to  increase or decrease for each o...

Would you expect the entropy of the system to  increase or decrease for each o...

Entropy of the Universe will increase for all but which of the following? A) ...

Consider the following figure of four processes from the initial state. The su...

Calculate ΔS°rxn for the following reaction. The S° for each species is shown ...

Consider the following reaction at constant P. Use the information here to det...

Place the following in order of increasing molar entropy at 298 K. CO2       ...

What is the sign of ΔS univ for a biological system? A) zero B) negative C)...

Which of the following processes shows a decrease in entropy of the system? A...

Identify the change in state that  DOES NOT have an increase in entropy of the...

Calculate ΔS°rxn for the following rreaction. The S° for each species is shown...

Consider the following reaction at constant P. Use the information here to det...

Place the following in order of increasing molar entropy at 298 K. [Least (lef...

What is the sign of ΔSuniv when a protein folds into its specific functional n...

Which of the following processes is accompanied by a decrease in entropy of th...

Identify the change in state for which there is an increase in the entropy of ...

The Entropy change of the Universe is A) Always equal to ΔSsurr B) Always th...

Elemental boron can be forrmed by reaction of boron trichloride with hydrogen....

Determine ΔS° for the reaction SO3(g) + H2O(l) → H2SO4(l).                  S...

Which of the following is true for a system at equilibrium? A) ΔS°sys = ΔS°su...

A certain process has ΔSuniv > 0 at 25°C. What does one know about the prro...

Which responses include all of the following processes that are acccompanied b...

Which of these species has the highest entropy (S°) at 25°C? A) CH3OH(l) B) ...

What are the signs for the change in enthalpy and change in entropy when a sys...

Which of the following statements describes situations where entropy increases...

Consider the reaction of N2O5 at 25°C for which the following data are relevan...

The diagram below depicts the spontaneous sublimation of I2 (s) at 25°C and 1 ...

Which of the following processes would have a positive ΔSsys value? (a) He(g)...

Which of the following has the greatest entropy, S? (a) 1.00 mole of liquid w...

The diagram below shows the variation in entropy with temperature for a substa...

Rank the standard molar entropy of the following from lowest to highest. 1. H...

Consider the following processes (at 298 K) given below and determine for whic...

In which process is entropy decreased ? a) dissolving sugar in water b) expa...

For which of these processes is the value of Δ S expected to be negative? I. ...

For which process is the entropy change per mole the largest at constant tempe...

A certain reaction is spontaneous at 72 °C. If the enthalpy change for the rea...

Consider the following facts: water freezes spontaneously at -5 °C and 1 atm, ...

One of the major sources of NOx compounds in our atmosphere is the reaction be...

  Explain the following plot: ...

Calculate the change in the standard entropy of the system, ΔS°, for the synth...

Predict the sign of ΔS for each of the following: a) A piece of wax melting ...

Predict which substance in each pair has the greater molar entropy: a) butane...

Consider the following reaction at constant P. Use the information here to det...

Consider the following processes (Treat all gases as ideal). 1. Nitrogen gas ...

______ is a thermodynamic function that increases with the number of energetic...

Consider the following reaction at constant pressure. Use the information here...

Which one of the following reactions is likely to have a ΔS° close to zero (in...

Which one of the following reactions is most likely to have a positive ΔS°? a...

Which of the following are always true for spontaneous processes:            ...

Which of the following statements describes situations where entropy increases...

Consider the reaction of N2O5 at 25°C for which the following data are relevan...

For the dissociation reaction of the acid HF HF ⇌ H+ + F - ΔS is observed to...

Which of the following processes result(s) in an increase in the entropy of th...

A spontaneous chemical reaction is FAVORED by which of the following? A. incr...

When an aqueous solution containing Al 3+ at 25°C is mixed with an aqueous sol...

Reactions with positive values of ∆S º r always become spontaneous at low temp...

Which of the following has the smallest molar entropy at 298 K? 1. Ne(g) 2. ...

What is true of the entropy of the universe? a. conserved b. continually dec...

Ce2(SO4)3 becomes less soluble in water as temperature increases because it ha...

Arrange the following substances in the order of increasing entropy at 25° C. ...

Which of the following reactions would be entropically favored?   A) Precipi...

Coal is a major source of energy that can be converted from its solid, raw for...

When temperature is increased and pressure is held fixed across a phase change...

Which of the following would have the   highest value of absolute entropy per ...

Which of the following statements regarding the third law of thermodynamics is...

______ is a thermodynamic function that increases with the number of energetic...

Which of the following processes have a positive entropy term?   A. Synthesi...