The cooling process in a refrigeration unit involves reducing the pressure above a liquid called the refrigerant. The pressure reduction causes vaporization, which cools the remaining liquid. A common refrigerant is Freon-11 (CCl₃F), which has a boiling point of 23.8 °C, a specific heat for the liquid of 0.870 J/g·°C, and an enthalpy of vaporization of 180 J/g.

(a) How much energy must be removed from 10.0 g liquid Freon-11 to cool it from its boiling point to 0 °C?

(b) What mass of Freon-11 must vaporize to remove the amount of heat calculated in part a?