Question

Molar heat capacity of water in equilibrium with the ice at constant pressure is?

Answer 1

Dear Student,

Heat capacity at constant pressure may be defined as the rate of change of enthalpy with temperature at constant pressure.
$C_p=\frac{dH}{dT}$
Since water and ice is at equilibrium, there is no change in temperature. They are at same temperature. So dT =0 and we know that something divided by 0 is infinity
Thus C_p= infinity ( at constant pressure)

Regards