volumetric heat capacity

The enthalpy of vaporization of Water at 100 deg C = 2257 (J/g)

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The enthalpy of vaporization is often quoted for the normal boiling temperature of the substance.

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The enthalpy of vaporization is a function of the pressure at which that transformation takes place.

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The enthalpy of vaporization (symbol ∆Hvap), also known as the (latent) heat of vaporization or heat of evaporation, is the amount of energy (enthalpy) that must be added to a liquid substance to transform a quantity of that substance into a gas.

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Webel vs SysPhS-1.1: Annex A.5: Humidifier: In EvaporationCalculation the specificHeat value 1.996 is off by a factor of about 2. It seems to have used the steam (gas) per gram value instead of the liquid water value per gram (or per mL volumetric) value.

Webel vs SysPhS-1.1: Annex A.5: Humidifier: Dimensional analysis of TemperatureIncrease and EvaporationCalculation implies the 'specificHeat' is a volumetric heat capacity, not a specific heat capacity (heat capacity per unit of mass).

The volumetric heat capacity can also be expressed as the specific heat capacity (heat capacity per unit of mass, in J/K/kg) times the density of the substance (in kg/L, or g/mL).

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The SI unit of volumetric heat capacity is joule per kelvin per cubic meter, J/K/m3 or J/(K·m3).

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Informally, it is the amount of energy that must be added, in the form of heat, to one unit of volume of the material in order to cause an increase of one unit in its temperature.

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The volumetric heat capacity of a material is the heat capacity of a sample of the substance divided by the volume of the sample.

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Isobaric volumetric heat capacity C(P,v) J⋅cm−3⋅K−1 of liquid Water at 100 °C = 4.2160

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Isobaric volumetric heat capacity C(P,v) J⋅cm−3⋅K−1 of liquid Water at 25 °C = 4.1796

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