Match the following processes with given entropy changes:

Process Entropy change
A. A liquid vaporizes 1.  S=0
B. Reaction is non-spontaneous at all temperatures and H is positive 2.  S=positive
C. Reversible expansion of an ideal gas 3.  S=negative


Codes:

A B C
1. 2 3 1
2. 1 2 3
3. 1 3 2
4. 3 2 1