Helium gas is heated at constant pressure by100C. 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
Jan 13, 2018

60 %

Explanation:

For isobaric process ,total heat energy is expressed as nCpdt
And internal energy as nCvdt
So, internal energy isnCvdtnCpdt times of total energy supplied i.e CvCp
Helium being a monoatomic gas its gamma value is 53 = CpCv
Hence, the percentage is (35)100or 60 %