CVEN 3313 Chapter Notes - Chapter 1-2: Specific Weight, Intermolecular Force, Surface Tension

• School: CU-Boulder
• Department: Civil Engineering
• Course: CVEN 3313
• Professor: John Crimaldi

Document Summary

Evaporation takes place when liquid molecules at the surface overcome the intermolecular. Section 1. 08-vapor pressure forces holding it together and escape into the atmosphere. The vapor is saturated when an equilibrium condition is reached. The vapor pressure varies for particular liquid temperatures. A liquid boils when the pressure is reduced to the vapor pressure. The formation of vapor bubbles within a fluid mass is said to be boiling: the boiling temperature is a function of altitude. In flowing liquids, it is possible for the pressure in localized regions to reach vapor pressure, thereby causing cavitation: cavitation is the formation and subsequent collapse of vapor bubbles in a flowing fluid. Surface tension is an interface between a liquid and a gas. This (cid:862)ski(cid:374)(cid:863) is the reaso(cid:374) (cid:449)hy so(cid:373)e o(cid:271)je(cid:272)ts float, it"s due to the u(cid:374)(cid:271)ala(cid:374)(cid:272)ed (cid:272)ohesi(cid:448)e forces. It acts like the skin, covering the entire surface action on the liquid molecules at the fluid surface.