The higher the temperature of a substance, the ____ its vapor pressure will be.

Prepare for the HAZMAT Operations WFD 45 Test with our quiz. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready to ace your exam!

Multiple Choice

The higher the temperature of a substance, the ____ its vapor pressure will be.

Vapor pressure is the pressure the vapor above a liquid exerts in equilibrium with that liquid. Temperature controls how many molecules have enough energy to break away from the surface. When you raise the temperature, more molecules gain the kinetic energy needed to escape into the vapor phase, so the number of vapor molecules increases and the pressure they exert goes up. That’s why a higher temperature leads to higher vapor pressure. This also helps explain why volatile liquids vaporize more quickly and can become hazardous when heated, since more vapor can accumulate and potentially reach flammable concentrations.

Vapor pressure is the pressure the vapor above a liquid exerts in equilibrium with that liquid. Temperature controls how many molecules have enough energy to break away from the surface. When you raise the temperature, more molecules gain the kinetic energy needed to escape into the vapor phase, so the number of vapor molecules increases and the pressure they exert goes up. That’s why a higher temperature leads to higher vapor pressure. This also helps explain why volatile liquids vaporize more quickly and can become hazardous when heated, since more vapor can accumulate and potentially reach flammable concentrations.

More practice questions