Ice at -10.4 C and steam at 138 C are brought together at atmospheric pressure in a perfectly insulated container. After thermal equilibrium is...

Ice at -10.4 °C and steam at 138 °C are brought together at atmospheric pressure in a perfectly insulated container. After thermal equilibrium is reached, the liquid phase at 51.5.3 °C is present. Ignoring the container and the equilibrium vapor pressure of the liquid at 51.5 °C, find the ratio of the mass of steam to the mass of ice. The specific heat capacity of steam is 2020 J/(kg C°). help plz