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I mole of gas having γ = 75 is mixed with I mole of a gas having γ = 43. What will be the γ for the mixture?

a
511
b
1513
c
1511
d
513

detailed solution

Correct option is C

For γ = 75     Cv = Rγ-1 = R75-1 = 5R2Cp = γRγ-1 = (75)R75-1 = 7R2For γ = 43      Cv = 3R,   Cp = 4R∴  γmix = 72+452+3 = 1511

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