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  2. Latent heat - Wikipedia

    en.wikipedia.org/wiki/Latent_heat

    Latent heat (also known as latent energy or heat of transformation) is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process—usually a first-order phase transition, like melting or condensation. Latent heat can be understood as hidden energy which is supplied or extracted to change the state ...

  3. Enthalpy of vaporization - Wikipedia

    en.wikipedia.org/wiki/Enthalpy_of_vaporization

    Temperature-dependency of the heats of vaporization for water, methanol, benzene, and acetone. In thermodynamics, the enthalpy of vaporization (symbol ∆H vap), also known as the (latent) heat of vaporization or heat of evaporation, is the amount of energy that must be added to a liquid substance to transform a quantity of that substance into a gas.

  4. Cooling curve - Wikipedia

    en.wikipedia.org/wiki/Cooling_curve

    The amount of energy required for a phase change is known as latent heat. The "cooling rate" is the slope of the cooling curve at any point. Alloys have a melting point range. It solidifies as shown in the figure above. First, the molten alloy reaches to liquidus temperature and then freezing range starts.

  5. Liquid water content - Wikipedia

    en.wikipedia.org/wiki/Liquid_water_content

    In the equation above, L c (T) is the latent heat of condensation of water at temperature T, m a is the mass of the air in the cloud chamber, c p is the specific heat of dry air at constant pressure and is the change in the temperature of the air due to latent heat.

  6. Heat of combustion - Wikipedia

    en.wikipedia.org/wiki/Heat_of_combustion

    Another definition of the LHV is the amount of heat released when the products are cooled to 150 °C (302 °F). This means that the latent heat of vaporization of water and other reaction products is not recovered. It is useful in comparing fuels where condensation of the combustion products is impractical, or heat at a temperature below 150 ...

  7. Heat transfer - Wikipedia

    en.wikipedia.org/wiki/Heat_transfer

    During condensation, the latent heat of vaporization must be released. The amount of heat is the same as that absorbed during vaporization at the same fluid pressure. [24] There are several types of condensation: Homogeneous condensation, as during the formation of fog. Condensation in direct contact with subcooled liquid.

  8. 5 Signs That It's Time to Turn on the Heat for Winter ... - AOL

    www.aol.com/lifestyle/5-signs-time-turn-heat...

    Whether you have a furnace or electric heat, knowing the right time to turn your heat on may prolong the system's life, prevent damage (like frozen pipes), and optimize energy efficiency. 1 ...

  9. Equivalent temperature - Wikipedia

    en.wikipedia.org/wiki/Equivalent_temperature

    Taking a volume of air at temperature T and mixing ratio of r, drying it by condensation will restore energy to the airmass. This will depend on the latent heat release as: + where: : latent heat of evaporation (2400 kJ/kg at 25°C to 2600 kJ/kg at −40°C)