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MHT CET202416 May 2024Morning ShiftPhysicsThermodynamicsActual

If heat energy Q is supplied to an ideal diatomic gas, the increase in internal energy is U and the amount of work done by the gas is W . The ratio W : U : Q is

Options

  1. A2: 3: 5
  2. B2: 5: 7
  3. C7: 5: 9
  4. D1: 2: 5

Correct answer

B. 2: 5: 7

Step-by-step solution

Fraction of given heat energy utilised in doing external work is given by the formula, aligned & ( W Q )= (1- 1 ) & aligned W Q & =1- 1 & =1- 1 ( 7 5 ) . ( _ diatomic = 7 5 ) aligned & aligned W Q & = 2 7 ...(i) aligned aligned The fraction of heat energy used to increase the internal energy of gas is, U Q = 1 = 5 7 ...(ii) From equations (i) and (ii), W : U : Q =2: 5: 7

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