Concept explainers
Introduction: A gas has greater entropy than a solid because in a gaseous state, the molecules are free to move in any direction while in solid state, the movement of molecules are restricted.
Answer to Problem 1SAQ
Solution:
The reaction given in option (a) will have a positive
Explanation of Solution
The phase transition is from solid to gas during the
The number of moles of gas decrease during a chemical reaction; 2 mol of gas have decreased to 1 mol, so the entropy decreases and
The number of moles of gas decrease during a chemical reaction; 3 mol of gas have decreased to 1 mol, so the entropy decreases and
Thus, the reaction given in option (a) will have a positive
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