Four moles of hydrogen, two moles of helium and one mole of water vapour form an ideal gas mixture. What is the molar specific heat at constant pressure of mixture?
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a
167 R
b
7R16
c
R
d
237R
answer is D.
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Detailed Solution
Cv for hydrogen = 5R2, Cv for helium = 3R2Cv for water vapour = 6R2∴ [Cv]mix = 4×5R2+23R2+1×3R4+2+1 = 16R7∴ Cp+Cv+R = 16R7+R = 23R7