chemistry--please check

1. In which of the following processes would the entropy of the system increase?
a. A liquid forming from a gas.
b. A solid forming from a gas.
c. The number of gas molecules increasing during a chemical reaction. <--
d. A solid precipitating from a solution.

2. The 2nd Law of Thermodynamics states that both matter and energy in a closed system
a. will continue to interact and change from one form to another
b. will eventually completely stop moving
c. maximize entropy over time <--
d. combine into a single pure crystalline substance over time

3. Which statement about entropy is true?
a. Entropy always increases. <--
b. There is no change in entropy if there is no temperature change.
c. Entropy is zero for reversible reactions.
d. Entropy is zero if all rotational, translational, and vibrational motion stops.

4. A spontaneous reaction is barely proceeding. A student claims that the reaction must not really be spontaneous since it's so slow. Which statement best explains the misconception here?
a. The student just needs to be patient.
b. Some spontaneous reactions are hard to see.
c. The activation energy must be attained before a reaction will proceed. <--
d. Spontaneity is not related to reaction rate.

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  1. I agree. Good work.

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