Part I 1) A reaction that is spontaneous as written A) is very rapid B) will pro

Question

Part I 1) A reaction that is spontaneous as written A) is very rapid B) will proceed without outside intervention C) is also spontaneous in the reverse direction D) has an equilibrium position that lies far to the left E) is very slow 2) The thermodynamic quantity that expresses the extent of randomness in a system is A) enthalpy B) internal energy C) bond energy D) entropy E) heat flow 3) Which one of the following is always positive when a spontaneous process occurs? A) ASsystem B) ASsurroundings C) ASuniverse D) Huniverse E) surroundings 4) The second law of thermodynamics states that B) }1°rxn-ErAH'f (products)-T mAH't (reactants) C) for any spontaneous process, the entropy of the universe increases D) the entropy of a pure crystalline substance is zero at absolute zero E) AS grev/T at constant temperature 5) Which one of the following processes produces a decrease of the entropy of the system A) dissolving sodium chloride in water B) sublimation of naphthalene C) dissolving oxygen in water D) boiling of alcohol E) explosion of nitroglycerine 6) AS is positive for the reaction A) 2H2 (g)+ 02(8)- 2H20 (8) B) 2NO2 (g) N204 (g) C) CO2 (g) CO2 (s) D) BaF2 (s) Ba2+ (aq) + 2F-(aq) El 2Hg (l) + O2 (g) 2Hgo (s)

Explanation / Answer

1. A reaction that is spontaneous will proceed without any outside intervention. (Option B)

2. Entropy is the thermodynamic quantity that expresses the extent of randomness in a system. (Option D)

3. DeltaSuniverse is always positive. ( Option A). This is according to the second law of thermodynamics.

4. The second law of thermodynamics states that the entropy of universe increases for any spontaneous process. ( Option C)

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