The thermodynamic basis for the Clausius–Claypeyron equation for liquid to vapor transition is developed and discussed with specific reference to the heat of vaporization (Lv) for water. Examples using the Clausius–Clapeyron, Antoine, and Richards equations for calculating Lv are presented.Keywords:...
An accurate indication is achieved by carrying out the calculations in small time steps, such as Δt = 0.004 s, and then by calculating the vaporization, humidity change, and corresponding temperature rise at each time step. This is the numerical solution of differential equations (4.326) and ...
The molar heat of vaporization is the energy needed to vaporize one mole of a liquid. The units are usually kilojoules per mole, or kJ/mol. Two possible equations can help you determine the molar heat of vaporization. To calculate the molar heat of vaporization, write down your given informa...
where Le is the latent heat of vaporization and is a function of sea surface temperature (SST, Ts) expressed as Le=(2.501−0.002 37×Ts)×1.06. cp is the specific heat capacity of air at constant pressure; ce and ch are the stability- and height-dependent turbulent exchange coefficients...
heat of vaporization is then ( ) [ ] b 2 LV A V RT r 2 N 2 n L + γπ = . (9) Equations (8) can not be used for high pressures since the ideal gas law is not valid for highly dense gasses. Using the experiments of water, the predicted linear relationship between the...
1.The saturated densities, vapour pressures, and latent heats of vaporization for HFC working substances of refrigeration are calculated by using a set of general equations of thermophysical property of liquids.应用一套通用型流体热物性方程对HFC类致冷工质的饱和密度、蒸汽压和汽化潜热进行计算。
Latent heat of vaporization for fluids like alcohol, ether, nitrogen, water and more. Melting and Boiling Temperatures - Evaporation and Melting Heats common Materials Melting and boiling point temperatures, latent heat of evaporation, and melting heat of common substances like copper, gold, lead and...
Heat transfer through the membrane by conduction and by movement of vapor across the membrane (latent heat of vaporization). The influence of mass transfer on the heat transfer can be ignored [75,97,107–109,114] (3.29)Qm=kmδTf,m−Tp,m+J△Hv (3.30)Qm=hmTf,m−Tp,m+J△Hv where...
Latent heat of vaporization, kJ/kg 20.4 448.7 199.2 213.1 510.8 Sensible heat of steam from boiling point to 300 K, kJ/kg 1541.5 3509.6 234.0 193.0 403.3 Ratio of sensible heat to latent heat 75.6 7.8 1.2 0.9 0.8 Sign in to download hi-res image Fig. 7. Latent heat vaporization and se...
Based on the thermodynamic theory of thermal pressure, the equations for vaporization-heat of pure substances were derived, and then used to calculate the vaporization-heat data for thirty-two substances including some strongly polar compounds, such as, methand, ethanol and acetic acid etc. 基于...