Calorimetry

2014 AIPMT 1 question

1. 1 Thermal Properties of Matter
   Steam at $100^\circ C$ is passed into 20 g of water at $10^\circ C$. When water acquires a temperature of $80^\circ C$, the mass of water present will be: [Take specific heat of water = 1 cal $g^{-1}$ $^\circ C^{-1}$ and latent heat of steam = 540 cal $g^{-1}$]
   A 24 g B 31.5 g C 42.5 g D 22.5 g
   Check Answer