Chapter 5, Problem 52E

Before the introduction of chlorofluorocarbons, sulfur dioxide (enthalpy of vaporization, 6.00 kcal/mol) was used in household refrigerators. What mass of SO₂ must be evaporated to remove as much heat as evaporation of 1.00 kg of ${\text{CC1}}_{\text{2}}{\text{F}}_{\text{2}}$ (enthalpy of vaporization is 17.4 kJ/mol)?

The vaporization reactions for ${\text{SO}}_{\text{2}}$ and are ${\text{SO}}_2\left(l\right)\to {\text{SO}}_2\left(g\right)$ and ${\text{CCl}}_2\text{F}\left(l\right)\to {\text{CCl}}_2{\text{F}}_2\left(g\right)$, respectively.