Question
Chemistry Question on Spontaneity
For independent processes at 300K
| Process | ΔH/kJmol −1 | ΔS/JK −1 |
|---|---|---|
| A | -25 | -80 |
| B | -22 | 40 |
| C | 25 | -50 |
| D | 22 | 20 |
The number of non-spontaneous processes from the following is
Answer
The correct answer is 2.
ΔG=ΔH−TΔS
A:ΔG(Jmol−1)=−25×103+80×300:−ve
B:ΔG(Jmol−1)=−22×103−40×300:−ve
C:ΔG(Jmol−1)=25×103+300×50:+ve
D:ΔG(Jmol−1)=22×103−20×300:+ve
Processes C and D are non-spontaneous.