<P> Boiling is the rapid vaporization of a liquid , which occurs when a liquid is heated to its boiling point , the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere . There are two main types of boiling ; nucleate boiling where small bubbles of vapour form at discrete points , and critical heat flux boiling where the boiling surface is heated above a certain critical temperature and a film of vapor forms on the surface . Transition boiling is an intermediate , unstable form of boiling with elements of both types . The boiling point of water is 100 ° C or 212 ° F but is lower with the decreased atmospheric pressure found at higher altitudes . </P>
<P> Boiling is the rapid vaporization of a liquid , which occurs when a liquid is heated to its boiling point , the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere . There are two main types of boiling ; nucleate boiling where small bubbles of vapour form at discrete points , and critical heat flux boiling where the boiling surface is heated above a certain critical temperature and a film of vapor forms on the surface . Transition boiling is an intermediate , unstable form of boiling with elements of both types . The boiling point of water is 100 ° C or 212 ° F but is lower with the decreased atmospheric pressure found at higher altitudes . </P>
when is a liquid considered to be boiling
when is a liquid considered to be boiling
the rapid vaporization of a liquid
the rapid vaporization of a liquid