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.
Introduction: The quantity of vapor above a liquid in a closed system increases with the temperature of the system. The quantity of vapor can be measured as the vapor pressure of the system. This relationship is pictorially shown in Figure 1.Figure 1. Pictorial representation of the increased quantity of gas above a liquid as the system is heated.his week in lab you will fit a set of vapor pressure vs. temperature data to the Clausius-Clapeyron equation to determine the heat of vaporization of an unknown liquid, shown in Figure 4. Figure 4. The linear relationship between ln(P) vs 1/T comes from the Clausius-Clapeyron equation.