Helium gas is heated at constant pressure by10^0 C. The percentage of heat energy supplied which is used in increasing the internal energy of the gas is? (A) 60% (B) 71% (C) 75% (D) 100%

1 Answer
Jane
Jan 13, 2018

60 %

Explanation:

For isobaric process ,total heat energy is expressed as n Cp dt
And internal energy as n Cv dt
So, internal energy is (n Cv dt)/(n Cp dt) times of total energy supplied i.e (Cv)/(Cp)
Helium being a monoatomic gas its gamma value is 5/3 = (Cp)/(Cv)
Hence, the percentage is (3/5)*100 or 60 %

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