Which reaction has the largest positive value of SӨ?
A. CO2(g) + 3H2(g) CH3OH(g) + H2O(g)
B. 2Al(s) + 3S(s) Al2S3(s)
C. CH4(g) + H2O(g) 3H2(g) + CO(g)
D. 2S(s) + 3O2(g) 2SO3(g)
Why is the answer C and not D? I understand the mole increases in C but in D, the state changes from solid to gas?
- Thread Starter
- 11-10-2017 15:56
- 11-10-2017 20:13
D involves 3x(g) -> 2x(g)
Whereas C involves 2x(g) -> 4x(g)
- 11-10-2017 21:54
Entropy is in J K-1 mol-1 so the number of moles makes the difference here.