Question

The instruction booklet for your pressure cooker indicates that its highest setting is 13.4 psipsi . You know that standard atmospheric pressure is 14.7 psipsi, so the booklet must mean 13.4 psipsi above atmospheric pressure. At what temperature in degrees Celsius will your food cook in this pressure cooker set on "high"?

Which of the following factors affect the vapor pressure of a liquid?

Check all that apply.

View Available Hint(s)

Check all that apply.

surface area of the liquid

addition of solute

temperature

type of liquid

atmospheric pressure

amount of liquid

Answer 1

The factors that affect the vapor pressure of the liquid :

a) Surface area of the liquid : No, it does not affect the vapor pressure of the liquid. It is independent of surface area because increase in surface area increases turning into vapors from the liquid. The ratio of mass of vapor/mass of liquid remains constant without any change.

b) Addition of solute : Yes, it has affect on the vapor pressure of the liquid because addition of solute like non volatile solutes decreases vapor pressure of the liquid according to Raoult's law.

These non volatile solute does not allow liquid to evaporate and does not contribute the vapor pressure of the solution.

c) Temperature : Yes, when temperature increases vapor pressure of the liquid increases because the heat energy applied increases the kinetic energy and helps in breaking the intermolecular forces. Due to which liquid molecules are easy to evaporate from surface of the liquid. This increases the vapor pressure

d) Type of liquid : Yes, because based on the type of liquid the strength of intermolecular forces are dependent. If there are weak intermolecular forces then they are easy to evaporate than strong intermolecular forces liquid molecule.

e) Atmospheric pressure : No, It does not have affect on vapor pressure but helps in determining the vapor pressure at the time of boiling

f) Amount of liquid : No, it does not have an affect on vapor pressure of the liquid because increase in the amount increases surface area which turn into vapors from the liquid also increases. The ratio of mass of vapor/mass of liquid remains constant without any change.