Question

Theheat capacity of liquid water at constant pressure, `C_(P)` is `18 cal deg^(-1) mol^(-1)`. The value of heat capacity of water at constant volume, `C_(V)`, is approximately
A. `18 cal deg^(-1) mol^(-1)`
B. `16cal deg^(-1) mol^(-1)`
C. `10.8 cal deg^(-1) mol^(-1)`
D. cannot be predicted.

Answer 1

Correct Answer - B
`C_(P)=C_(V)=2 cal deg^(-1)mol^(-1)`
`C_(V)=C_(P)-2=18-2`
`=16cal deg^(-1)mol^(-1)`