Specific heat of steam : Evaporative cooling. (See the top-note about entries over 100C being at the seawater vapor pressure, i.e. Existing formulae and approximations for the latent heat of vaporization of water, L v, are reviewed. If you're seeing this message, it means we're having trouble loading external resources on our website. With this release of heat, the steam is con-verted into water, but the newly converted water is still at boiling temperature, 100 °C. Using an analytical approximation to the saturated vapour pressure as a function of temperature, a new, temperature‐dependent function for L v is derived. Specific heat capacity and heat of vaporization of water. Number of times cited according to … Latent heat of vaporization: Heat necessary to transform 1 kg of ebullient water into vapour without change of temperature (thermal energy necessary during the change of state liquid to the state vapour). Which means, that much heat is required to break inter-molecular forces and turn into gasoeus phase. Latent heat of vapourisation of water at 1 bar, $100^\circ C$ is $2257 \frac{kJ}{kg}$. The Latent Heat of Vaporization of Water The Latent Heat of Vaporization of Water Aim: The aim is to determine the latent heat of vaporization of water by doing an experiment of boiling water. boiling equilibrium) For comparison to the thought experiment in the question above, note that the heat is proportional to the water in the salt+water mix. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. The latent heat of vaporization as a function of temperature and salinity can be found on page 9 of the Seawater Thermophysical Properties Library. As pressure on molecules increases they require more heat to overcome the pressure force acting or to escape and thus latent heat required is more. One, the latent heat of vaporization is released. Second, the newly converted water releases heat as it comes into thermal equilibrium with the cooler water, at a final equilibrium temperature, T final. Citing Literature. Why ice floats. Theory: The latent heat of vaporization is the amount of energy that is required to transfer a kg of liquid from the liquid state to the gaseous state.