LECTURE PHYSICAL CHEMISTRY 3rd EDITION ROBERT G. MORTIMER

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The partial molar enthalpy of an ideal gas does not
depend on pressure.
According to Dalton’s law of partial pressures, each
gas in a mixture of ideal gases behaves as though it
were alone in the container. Equation (4.5-23) applies
to any substance in an ideal gas mixture:
where µ ◦ i is the chemical potential of substance i in the
standard state at pressure P ◦ and P i is its partial
pressure. All of the other equations for one-component
ideal gases apply as well.
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