Multiple Choice
Which of the following would allow an energetically unfavorable process to occur in the cell?
19. Chemical Thermodynamics
Spontaneous vs Nonspontaneous Reactions
Back19. Chemical Thermodynamics
Spontaneous vs Nonspontaneous Reactions
- Multiple ChoiceWhich of the following processes is considered energetically unfavorable?
- Multiple ChoiceFor a reaction to be spontaneous at all temperatures, the signs of ΔH and ΔS must be:
- Multiple Choice
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.
- Multiple ChoiceWhich of the following is (are) spontaneous processes?
(i)a ball rolling down a hill
(ii)a car rusting
(iii)the decomposition of water into H2 gas and O2 gas - Multiple ChoiceA positive ΔSsystem indicates what about the overall spontaneity of a process?
- Multiple ChoiceA process is always spontaneous under which conditions?
- Multiple ChoiceWhich of the following is a true statement about the relationship between ΔG and K?
- Multiple ChoiceAt what temperature does the following reaction become nonspontaneous?
2 NO (g) + O2 (g) → 2 NO2 (g)
- Multiple ChoiceWhich of the following would have a negative ΔS?
- Multiple ChoiceWhich of the following is a true statement about ΔSsurroundings?
- Multiple ChoiceCalculate ΔSsurr (in units of J/K) for the process in which 2.00 mol of water are placed into a freezer at −10.0℃.
- Multiple ChoiceCalculate ΔS°rxn (J/K) for the formation reaction of the salt MgO (s).
- Open QuestionA reaction that is spontaneous as written
- Open QuestionWhich of the following processes are spontaneous?