Physics - Heat & Thermo Question with Solution | TestHub

A calorimeter of water equivalent$20 \mathrm{g}$contains$180 \mathrm{g}$of water at$25°\mathrm{C}$.${}^{\text{'}}\mathrm{m}^{\text{'}}$' grams of steam at$100°\mathrm{C}$is mixed in it till the temperature of the mixture is$31°\mathrm{C}$. The value of${}^{\text{'}}\mathrm{m}^{\text{'}}$is close to (Latent heat of water$=540 \mathrm{cal} {\mathrm{g}}^{-1}$, specific heat of water$=1 \mathrm{cal} {\mathrm{g}}^{-1°}{\mathrm{C}}^{-1}$)