Question

Entropy Question Please =)

Here is the link to the question =)

http://i289.photobucket.com/albums/ll211/zephyrxX_Y/ScreenShot2013-05-14at52356PM_zps1a2f817f.png

Could you please explain why I and II is correct, and III is wrong please?

Answer 1

1)
\[\Large \Delta S=\int\limits_{T _{i}}^{T _{f}}\frac{ dq _{rev} }{ T }\]If we assume non-expansion work and the tempeature increase, we get that \(T_{f}>T_{i}\) and therefor \(\Delta S\)>0.

2)
Sure we get by lowering the partial pressure (concentration), we increase the entropy. (Le Chatelier's principle,)

3) Same in a 2) Le Chatelier's principle,

Remember entropy is a good way to say something about the natural direction of spontaneous change.

Answer 2

OMG.

Answer 3

What now? <.<

Answer 4

It is not rocket science.