Chemists sometimes carry out reactions in liquid ammonia as a solvent. With adequate safety protection these reactions can be done at temperatures above ammonia’s boiling point in a sealed, thick walled glass tube. If the reaction is being carried out at 20°C, what is the pressure of ammonia inside the tube? (Use data from the previous question to answer this question.)

Data given in Previous Question

Vapor pressures of NH₃(ℓ) at several temperatures are given in the table below. Use this information to calculate the enthalpy of vaporization of ammonia.