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Question

Chemistry Question on Entropy and free energy

Predict in which of the following, entropy decreases:

A

A liquid crystallizes into a solid.

B

Temperature of a crystalline solid is raised from 0 K to 115 K.

C

2NaHCO3(s)Na2CO3(s)+CO2(g)+H2O(g)2NaHCO_3(s) Na_2CO_3(s) + CO_2(g) + H_2O(g)

D

H2(g)→2H(g)H_2(g)→2H(g)

E

2SO3(g)→2SO2(g)+O2(g)2SO_3(g)→2SO_2(g) + O_2(g)

Answer

2NaHCO3(s)Na2CO3(s)+CO2(g)+H2O(g)2NaHCO_3(s) Na_2CO_3(s) + CO_2(g) + H_2O(g)

Explanation

Solution

The correct option is (C) : 2NaHCO3(s)Na2CO3(s)+CO2(g)+H2O(g)2NaHCO_3(s) Na_2CO_3(s) + CO_2(g) + H_2O(g)