A perfect gas goes from state $A$ to another state $B$ by absorbing $8 \times {10^5}J$ of heat and doing $6.5 \times {10^5}J$ of external work. It is now transferred between the same two states in another process in which it absorbs ${10^5}J$ of heat. Then in the second process
  • AWork done on the gas is $0.5 \times {10^5}J$
  • BWork done by gas is $0.5 \times {10^5}J$
  • CWork done on gas is ${10^5}J$
  • DWork done by gas is ${10^5}J$
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