Final answer:
The factors that affect vapor pressure of a liquid are temperature, solute concentration, and the identity of the liquid.
Step-by-step explanation:
Vapor pressure is influenced by temperature. As the temperature increases, more molecules are released from the surface of the liquid. This increases movement above the liquid surface, increasing the pressure in the vapor stage. The decrease in vapor pressure of a liquid depends on the strength of its intermolecular forces. Liquids with strong intermolecular forces have lower vapor pressures compared to liquids with weaker intermolecular forces.
Solute concentration also affects vapor pressure. When a nonvolatile solute is dissolved in a liquid, it occupies the surface sites of the solution, reducing the number of solvent molecules that can escape into the vapor phase. This leads to a decrease in vapor pressure.
The identity of the liquid itself also plays a role in affecting vapor pressure. Different liquids have different intermolecular forces, which determine their vapor pressure at a given temperature.