When M_1 gram of ice at -10^° C (specific heat =0.5 cal g^-1^° C^-1 ) is added to M_2 gram of water at 50^° C, finally no ice is left and the water…

When $\displaystyle \mathrm{M}_1$ gram of ice at $\displaystyle -10^{\circ} \mathrm{C}$ (specific heat $\displaystyle =0.5 \mathrm{cal} \mathrm{g}^{-1}{ }^{\circ} \mathrm{C}^{-1}$ ) is added to $\displaystyle \mathrm{M}_2$ gram of water at $\displaystyle 50^{\circ} \mathrm{C}$, finally no ice is left and the water is at $\displaystyle 0^{\circ} \mathrm{C}$. The value of latent heat of ice, in cal $\displaystyle \mathrm{g}^{-1}$ is :