19. Chemical Thermodynamics

Which of the following is a true statement about ΔS_surroundings?

Which of the following is a true statement about the relationship between ΔG and K?

Which of the following statements is/are true?

a) The rusting of iron by oxygen is a non-spontaneous reaction.

b) The addition of a catalyst to a reaction increases spontaneity.

c) The movement of heat from a cold object to a hot object is a non-spontaneous reaction.

d) The diffusion of perfume molecules from one side of a room to the other is a non-spontaneous reaction.

e) None of the above. 

Which of the following would allow an energetically unfavorable process to occur in the cell?

Calculate ΔS°_rxn (J/K) for the formation reaction of the salt MgO (s).

At what temperature does a reaction become spontaneous at standard conditions if only the Gibbs free energy change (ΔG) is known?

We do not observe the diamond converting to graphite under normal conditions. Which of the following is the correct explanation?

Which of the following processes is spontaneous?

Which of the following statements is true regarding spontaneous reactions?

Which of the following pairs of reactants will result in a spontaneous redox reaction at 25°C?

A positive ΔS_system indicates what about the overall spontaneity of a process?

Which of the following processes is spontaneous?

What can be said about an endothermic reaction with a negative entropy change in terms of spontaneity?

Which of the following processes are spontaneous?

We do not observe the diamond converting to graphite under normal conditions. Which of the following is the correct explanation?