First law of thermodynamics – change in internal energy

2018 1 question

1. A sample of 0.1 g of water at $100^\circ C$ and normal pressure ($1.013 \times 10^{5}\ N m^{-2}$) requires 54 cal of heat energy to convert to steam at $100^\circ C$. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample, is