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mole fraction and mass fraction

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a mixture of carbon dioxide and water vapour is at 100kPa, 200C temperature. As the mixture is cooled at a constant pressure, water vapour begins to condense when the temperature reaches 70C , determine mole fraction and mass fraction of carbon dioxide in the mixture?

T                               h

270K                       -820kJ/kmol

277.778K                  h2

280K                       -528kJ/kmol

the molar specific enthalpy of nitrogen at 277.778K is -592.88kJ/kmol

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