Longitudinal Waves. To see a animations of spherical longitudinal waves check out: In a longitudinal wave the particle displacement is parallel to the direction of wave propagation. The animation at right shows a one-dimensional longitudinal plane wave propagating down a tube.
The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the pressure surrounding the liquid and the liquid changes into a vapor.
When the temperature reaches 100Â°C the vapor pressure reaches 1 atm and the water boils. When a solute is added to a liquid, it will decrease the vapor pressure of the liquid, as long as the solute itself is not volatile.In fact this is the way in which the boiling point is affected. phenomenon that is related somewhat to the change in freezing point, the change in boiling point, and the change in vapor pressure of solutions when compared to pure solvents, is the process of osmosis.