internal energy Questions

$1\text{g}$ of water of volume $1{\text{cm}}^3$ at $100^{\circ }\text{C}$ is converted into steam at the same temperature under normal atmospheric pressure $\approx 1\times 10^5\text{Pa}$. The volume of steam formed equals $1671{\text{cm}}^3$. If the specific latent heat of vaporization of water is $2256\text{J/g}$, the change in internal energy is: