Final answer:
The vapor pressure of the solution is directly proportional to the amount of the solvent. Boyle's law and Avogadro's law contextualize how pressure, volume, and temperature are related in gases, not in solutions directly.
Step-by-step explanation:
The vapor pressure of the solution is directly proportional to the amount of the solvent in the solution. This means that as the amount of solvent increases, the vapor pressure of the solution also increases, provided that the temperature is kept constant. When solute particles occupy surface sites of the solution, they reduce the number of solvent molecules that can escape into the gas phase, thus lowering the vapor pressure. Therefore, adding solute to a solvent decreases the solution's vapor pressure, and this effect is proportional to the concentration of the solute.
When discussing the relationship between vapor pressure and volume, it is important to note Boyle's law, which states that the pressure of a gas is inversely proportional to its volume when temperature and the amount of gas are held constant. Conversely, Avogadro's law posits that the volume of a gas is directly proportional to the number of gas molecules, assuming constant temperature and pressure.