vapour-pressure curve
Quick Summary
The vapour-pressure curve illustrates the relationship between temperature and pressure where a substance exists in equilibrium between its liquid and gaseous states. Vapour pressure itself is the pressure exerted by a vapour in equilibrium with its liquid or solid form. This pressure increases with temperature. The point at which a liquid's vapour pressure equals the surrounding pressure is known as its boiling point. The vapour-pressure curve is a key component of a substance's phase diagram, showing how different phases (solid, liquid, gas) exist under varying temperature and pressure conditions.12
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
thermodynamicsThe Clausius-Clapeyron equation…pressure remains equal to the vapour pressure Pvap as the piston moves up, as long as both phases remain present. All that happens is that more water turns to steam, and the heat reservoir must supply the latent heat of vaporization, λ = 40.65 kilojoules per mole, in order to…
Read More…pressure remains equal to the vapour pressure Pvap as the piston moves up, as long as both phases remain present. All that happens is that more water turns to steam, and the heat reservoir must supply the latent heat of vaporization, λ = 40.65 kilojoules per mole, in order to…
Read More
liquidPhase diagram of a pure substance…the line TC, called the vapour-pressure curve, liquid and vapour exist in equilibrium. The liquid region exists to the left and above this line while the gas, or vapour, region exists below it. At the upper extreme, this curve ends at the critical point, C. If line TC is crossed…
Read More…the line TC, called the vapour-pressure curve, liquid and vapour exist in equilibrium. The liquid region exists to the left and above this line while the gas, or vapour, region exists below it. At the upper extreme, this curve ends at the critical point, C. If line TC is crossed…
Read More