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KVPY2017ChemistryThermodynamics (C)

A system consisting of 1 mol of an ideal gas undergoes a reversible process, A B C A (schematically indicated in the figure below). If the temperature at the starting point A is 300 ~K and the work done in the process B C is 1 ~L ~atm , the heat exchanged in the entire process in L atm is

Options

  1. A1.0
  2. B0.0
  3. C1.5
  4. D0.5

Correct answer

C. 1.5

Step-by-step solution

For process A C , W =0, E =0, q =0 For process A B W =-1(1.5-1)=-0.5 lit. atm E = q + W 0= q + W q =- W =-(-0.5)=0.5 lit. atm For process B C , W =1 ~atm array l E = q + W 0= q - W - q = W =-1 ~atm array Total heat exchanged =1.5

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