Which of the following factors affects the vapor pressure of a liquid?
temperature
pressure
volume
density
The vapor pressure of a liquid is dependent on the temperature of the system. As the temperature increases, the vapor pressure also increases due to the increased kinetic energy of the molecules, which leads to more molecules escaping from the liquid phase and entering the gas phase. The other factors listed, such as pressure, volume, and density, can affect the physical properties of the liquid, but do not have a direct effect on the vapor pressure.