What is the enthalpy of 1 kg of dry saturated steam at 750 kPa?

To determine the enthalpy of 1 kg of dry saturated steam at a pressure of 750 kPa, one must refer to the steam tables, which provide thermodynamic properties for water and steam at various pressures and temperatures.

At 750 kPa, the steam tables indicate that the enthalpy (h) of dry saturated steam is approximately 2766.4 kJ/kg. This value reflects the total heat content of the steam, including both the sensible heat and the latent heat that is required to convert water from liquid to vapor phase without changing temperature.

This phenomenon occurs due to the energy required to break intermolecular bonds during the phase change, which is significant for determining the enthalpy value at this pressure. The option that lists 2766.4 kJ/kg accurately represents the enthalpy of dry saturated steam at this specified condition, making it the correct answer.

Other values listed do not correspond to the enthalpy of dry saturated steam at 750 kPa according to the steam tables and would generally represent either incorrect states or be indicative of values at different pressures or conditions.