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Latent heat of vaporisation of saturated steam vs temperature

Dry saturated steam from 100 to 200 °C — saturation pressure, vapour density and latent heat along the boiling line that low and medium pressure steam heating runs on.

Latent heat of vaporisation in kJ/kg, from 100 to 200 °C along the saturation curve. The chart and the table below are the same numbers; the table is the one you can copy.

Latent heat of vaporisation kJ/kg
Latent heat of vaporisation of saturated steam in kJ/kg, from 100 to 200 °C100 °C — 2,256 kJ/kg110 °C — 2,230 kJ/kg120 °C — 2,202 kJ/kg130 °C — 2,174 kJ/kg140 °C — 2,144 kJ/kg150 °C — 2,114 kJ/kg160 °C — 2,082 kJ/kg170 °C — 2,049 kJ/kg180 °C — 2,014 kJ/kg190 °C — 1,978 kJ/kg200 °C — 1,940 kJ/kg1950200020502100215022002250100110120130140150160170180190200Temperature (°C)Latent heat of vaporisation (kJ/kg)
Saturated steam — everything else at 150 °C (default)
Density2.548 kg/m³
Vapour pressure476.16 kPa
Dynamic viscosity0.01419 mPa·s
Specific heat2.314 kJ/(kg·K)
Thermal conductivity0.0288 W/(m·K)
Latent heat of vaporisation by temperature
Temperature (°C)Latent heat of vaporisation (kJ/kg)Row
1002,256.4published
1102,230published
1202,202.1published
1302,173.7published
1402,144.2published
1502,113.7published
1602,082published
1702,048.8published
1802,014.2published
1901,977.9published
2001,939.8published

Rows marked published land exactly on a source anchor and are the tabulated figure. The rest are this library’s interpolation between the two anchors either side — good enough to design with, and said out loud so you can decide that for yourself.

IAPWS-95 / ASME Steam Tables · validated 100 to 200 °C · interpolated between 11 published anchors (values held, not extrapolated, past the ends) · saturated state only

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