Chapter 5, Problem 85AP

The heat of vaporization of a liquid $\left(\Delta H_{\text{vap}}\right)$ is the energy required to vaporize 1.00 g of the liquid at its boiling point. In one experiment. 60.0 g of liquid nitrogen $\left(\text{boiling point = - 196°C}\right)$ is poured into a Styrofoam cup containing $\text{ 2}{\text{.00 × 10}}^{\text{2}}\text{g of water at 55}\text{.3°C}$. Calculate the molar heat of vaporization of liquid nitrogen if the final temperature of the water is $\text{41}\text{.0°C}\text{.}$