Which of the following processes shows a decrease in entropy of the system? NaCl

Question

Which of the following processes shows a decrease in entropy of the system? NaClO_3 (s) rightarrow Na^+ (aq) ClO_3^- (aq) CH_3OH (l) rightarrow CO (g) + 2 H_2 (g) H_2O(l) rightarrow H_2O (g) 2 NO (g) + O_2 (g) rightarrow 2 NO_2 (g) COCl_2 (g) rightarrow CO (g) + Cl_2 (g) What is the entropy (S) of a system with 6.1 times 10^34 microstates? 8.3 times 10^-4 J/K 1.1 times 10^-21 J/K 9.6 times 10^4 J/K 8.8 times 10^-23 J/K 7.96 J/K When heat leaves a system, what happens to the entropy of the surroundings? The entropy of the surroundings is not affected by heat exchange with the system. The entropy of the surroundings decreases. The entropy of the surroundings increases.

Explanation / Answer

Q22

decrease in entropy --> chaos decreases

a)

dissolution increses chaos, therefore, this is not an answer

b)

1 mol of liquid forms 3 mol of gas, chaos increases

c)

liquid to gas increases chaos

d)

3 mol of gas to 2 mol of gas, there is a decrease in entropy

e)

1 mol of gas produces 2 mol of gases

therefore, choose D; 2NO(g) + O2(g) = 2NO2(g)

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