Boiling point liquid is the highest temperature (and pressure) it will actually boil at. See also Vapour pressure of water. The element with the lowest boiling point is helium. Both the boiling points of rhenium and tungsten exceed 5000 K at standard pressure; because it is difficult to measure extreme temperatures precisely without bias, both have been cited in the literature as having the higher boiling point. As can be seen from the above plot of the logarithm of the vapor pressure vs. the temperature for any given pure chemical compound, its normal boiling point can serve as an indication of that
Nucleate boiling formula_6 is the Prandtl number of the liquid. The bubble Reynolds number, formula_7 is defined as, formula_8 Where formula_9 is the average mass velocity of the vapor leaving the surface and formula_10 is the liquid viscosity. Rohsenow has developed the first and most widely used correlation for nucleate boiling, <math>\frac{q}{A}= Nucleate boiling Nucleate boiling is a type of boiling that takes place when the surface temperature is hotter than the saturated fluid temperature by a certain amount but where the heat flux is below the critical heat flux. For water, as shown in the graph below, nucleate boiling occurs when