Heating Steam Above Saturation Temperature

The process of heating dry steam above its saturation temperature at a constant pressure is specifically known as superheating.

Defining Superheating

Saturation temperature is the boiling point of water (or the condensation point of steam) at a specific pressure. When steam exists exactly at this temperature, it is called saturated steam. If this saturated steam is further heated without increasing the pressure, its temperature rises above the saturation point. This state is called superheated steam.

Why Other Options Are Incorrect

• Enthalpy: This is a thermodynamic property representing the total heat content of a system. While superheated steam has higher enthalpy than saturated steam, 'enthalpy' itself does not describe the heating process.
• Super saturation: This term typically refers to solutions containing more dissolved solute than is normally possible under stable conditions. It is not used for heating gases like steam.
• Latent heat: This is the heat energy required for a substance to change its state (e.g., from liquid to gas) at its saturation temperature without a change in temperature. It is involved in reaching the saturation state, not heating above it.

Therefore, the correct term for heating dry steam above its saturation temperature is superheating.