Solution: The following reaction is endothermic: 2 H2O (l...
Question
The following reaction is endothermic:
2 H2O (l) → 2 H2 (g) + O2 (g)
Which of the following answers correctly describes the spontaneity:
A. This reaction is always spontaneous
B. This reaction is only spontaneous at low temperatures
C. This reaction is only spontaneous at high temperatures
D. This reaction is never spontaneous
Related Solutions
Assuming the following ΔH°rxn and ΔS°rxn values are independent of temperature...
Solid ammonium nitrate is very soluble in water. When it dissolves, the soluti...
For the reaction 2 C(s) + 2 H2(g) → C2H4(g) ∆H°r = +52.3 kJ · mol−1 and ∆S°...
For the reaction 2 SO3(g) → 2 SO2(g) + O2(g) ∆H◦r = +198 kJ·mol−1 at 298 K. ...
Which of the following is true of a general thermodynamic state function? 1. ...
Ethane is C2H6. Consider the reaction below: C2H6(g) ⇋ 2 Cgraphite(s) + 3 H2...
For the reaction 2 SO3(g) → 2 SO2(g) + O2(g) ∆H◦r = +198 kJ · mol−1 and ∆S◦r...
You observe that carbon dioxide sublimes. Which of the following statements ab...
Consider the following sets. Which one indicates a NON-spontaneous reaction. ...
For the reaction A2(g) + B(s) → A2B(g) ΔH° > 0 and ΔS° > 0 Which of th...
The following reaction is endothermic: 2 H2O (l) → 2 H2(g) + O2(g) Which of ...
Given that the normal freezing point of ammonia is -78°C. Predict the signs of...
For the reaction given below, ΔH° = -1516kJ and ΔS° = -432.8J/K at 25°C SiH4(...
Which of the following processes WILL NOT be spontaneous at 1000 K? A) ...
Consider a 1.00 L solution of 0.150 M HCN (Ka = 4.9 * 10−10); Assume carbon is...
Consider a reaction that has a positive ΔH and a positive ΔS. Which of the fol...
Which of the following statements is TRUE? A) Entropy is not a state function...
If a process has a ΔH = +48 kJ/mol and a ΔS = -130 J/mol K at what T will it b...
Sodium carbonate can be made by heating sodium bicarbonate: 2 NaHCO3(s) → Na2...
The thermodynamic condition for a spontaneous process at constant T and P is ...
The reaction rates of many spontaneous reactions are actually very slow. Which...
A spontaneous endothermic reaction always A) causes the surrroundings to get ...
Which of the following is an example of a nonspontaneous process? A) ice melt...
When a liquid evaporates, which is true about the signs of the enthalpy and en...
For which reaction, carried out at standard conditions, would both the enthalp...
For the process O2 (g) → 2 O (g), ΔH ° = + 498 kJ. What would be predicted for...
When solid NH4NO3 is dissolved in water at 25°C, the temperature of the soluti...
When barium hydroxide is dissolved in water, the temperature of the solution i...
Which of the following statements is TRUE? (a) An exothermic process will alw...
Consider the following facts: water freezes spontaneously at -5 °C and 1 atm, ...
The process by which plants convert CO2 and H2O into C6H12O6 and O2 is called ...
Consider the reaction: 2O(g) → O2(g) a) Predict the signs of ΔH and ΔS. (Ther...
The plot of change in free energy versus temperature (T) shown below correspon...
Kw for the auto-ionization of water, H2O(l) → H+(aq) + OH− (aq), is 1.0 × 10−1...
Which reaction below is most likely spontaneous at any temperature? a) CH3CH...
Which of the following relationships must be true of any reaction at equilibri...
Which of the following statements are true? I. In a spontaneous process, the ...
The normal freezing point of ammonia is -78°C. Predict the signs of ∆H, ∆S, an...
The equilibrium constant for the reaction NH4Cl(s) → NH3(g) + HCl(g) is 1.1 ...
What factor ultimately determines whether any physical process, including a ch...
Which of the following is true regarding a non-spontaneous process: ...
The following reaction is endothermic: 2 H2O (l) → 2 H2 (g) + O2 ...
For a reaction in which ΔH = 125 kJ/mol and ΔS = 325 J/K•mol, determine the te...
Given the following reaction: A(g) ⇌ B(g), the forward reaction is spontaneous...
The combustion reactions of hydrocarbons are reactions where ΔH°< 0 and ΔS°...
Physical processes, including chemical reactions, tend to go towards ________ ...
As O2 (l) is cooled at 1 atm, it freezes at 54.5 K to form Solid I. At a lower...
For the reaction A + B ⇌ C + D, ΔH°= +40 kJ and ΔS°= +50 J/K. Therefore, the r...
A mixture of hydrogen and chlorine remains unreacted until it is exposed to ul...
Consider the equation carefully, and think about the sign of ∆S for the reacti...
The sublimation of solid carbon dioxide is a spontaneous process. Predict the ...
Which of the following is always positive when a spontaneous process occurs? ...
Which is a state function (mark all that apply)? a) flame heating b) enthalp...
What is true for the following reaction under standard condition? C2H6 (g) → ...
Which reaction below is most likely spontaneous at any temperature? a. CH3CH2...
A reaction has a standard entropy change of +32.83 J/K and a standard enthalpy...
Which statement best describes spontaneous reactions? a) Spontaneous reaction...
The following reaction is exothermic. N2 (g) + 3...
Which of the following is required for a spontaneous reaction: A. The entr...
When ammonium ion and nitrate ion combine they form ammonium nitrate, NH4NO3. ...
The reaction between elemental nitrogen and elemental hydrogen, shown below, i...
For a certain chemical reaction,ΔH = 128 kJ/mol and ΔS = 64 J/ (mol × K) . Wha...
If a reaction is exothermic but experiences a decrease in its entropy, under w...
Consider the conversion of a substance from solid to liquid. Solid ⇌ Liquid ...
Above what temperature does the following reaction become spontaneous? FeO (s...
Which of the following statements is TRUE? a. State functions are not depe...