Question
Chemistry Question on Thermodynamics
For a spontaneous process the correct statement is
A
entropy of the system always increases
B
free energy of the system always increases
C
total entropy change is always negative
D
total entropy change is always positive
Answer
total entropy change is always positive
Explanation
Solution
A process in which all steps cannot be retraced by themselves is called spontaneous process. Entropy is a characteristics of spontaneous process and is accompanied by an increase in the disorder or "randomness" of the molecules constituting the system so for a spontaneous process, total entropy change is always positive.