The amount of heat that must be added for water to steam changes in
H (fusion).
Water exists as a gas in steam. A sufficient amount of heat must be applied to the water to get it to the boiling point, and then further heat must be applied to transform the water's condition from liquid to steam without raising its temperature.
In saturated steam, the connection between temperature and pressure is strictly proportional. In other words, pressure rises as the temperature does.
The amount of heat or energy needed to raise a substance's temperature by 1 °C per unit mass of that substance is known as its specific heat capacity. The equation is Cv = Q / (T m).
The change in heat required to turn water into steam is measured in H (fusion).
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