The amount of heat supplied to decrease the volume of an ice water mixture by 1 ${\mathrm{cm}}^3$ without any change in temperature, is equal to: 

(${\mathrm{\rho }}_{\mathrm{ice}}=0.9, {\mathrm{\rho }}_{\mathrm{water}} = 80 \mathrm{cal}/\mathrm{gm}$)