Question

The equilibrium concentration o the species in the reaction `A+B hArr C+D` are 3,5,10 and 15 mol `L^(-1)` respectively. At 300 K, the `DeltaG` for the reaction is
A. 13.81
B. `-1381.8`
C. `-138.18`
D. 1391.6

Answer 1

Correct Answer - B
`underset(3)(A)+underset(5)(B) hArr underset(10)(C)+underset(15)(D)`
`therefore K_(eq)=(10xx15)/(3xx5)=10`
`because DeltaG=-2.303RTlogK`
`therefore DeltaG=-2.303xx2xx300xxlog10`
`=-2.303xx2xx300xx1=-1381.8cal`