Abstract
This paper provides calculated values of specific enthalpy, specific entropy and specific Gibbs energy associated with moist hydrogen and air. They cover the range of interest in humidity control and measurement methods for fuel cell applications from water vapor content of dew-point temperatures 60 {degree sign}C to 200 {degree sign}C with absolute pressures of 0.1 MPa, 0.5 MPa, 1 MPa and 2 MPa. Molar enthalpy, molar entropy and molar Gibbs free energy of moist hydrogen and air are expressed explicitly in terms of the associated water vapor density. The values of the molar quantities are the sum of three parts due to: 1. The mole fraction of water vapor in a gas mixture; 2. The mole fraction of dry hydrogen or dry air in a gas mixture ; and 3. The effects of interaction between water molecules and hydrogen as well as air molecules.
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