Helium gas is heated at constant pressure by#10^0 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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