19. Chemical Thermodynamics
Spontaneous vs Nonspontaneous Reactions
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Practice this topic
- 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.
3646views17rank1comments - 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 gas810views - Multiple ChoiceA positive ΔSsystem indicates what about the overall spontaneity of a process?843views
- Multiple ChoiceA process is always spontaneous under which conditions?983views
- Textbook Question
The accompanying diagram shows how entropy varies with temperature for a substance that is a gas at the highest temperature shown. (c) If this substance is a perfect crystal at T = 0 K, what is the value of S at this temperature?
492views - Textbook Question
Which of the following processes are spontaneous and which are nonspontaneous: (d) lightning
943views1rank - Textbook Question
Which of the following processes are spontaneous and which are nonspontaneous: (e) formation of CH4 and O2 molecules from CO2 and H2O at room temperature and 1 atm of pressure?
1390views - Textbook Question
Which of the following processes are spontaneous and which are nonspontaneous: (a) the ripening of a banana
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