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JEE Main202120 Jul 2021Morning ShiftPhysicsThermodynamicsActual

The amount of heat needed to raise the temperature of 4 moles of a rigid diatomic gas from 0 ° C to 50 ° C when no work is done is ( R is the universal gas constant)

Options

  1. A250 R
  2. B750 R
  3. C175 R
  4. D500 R

Correct answer

D. 500 R

Step-by-step solution

Δ Q = Δ U + Δ W Here Δ W = 0 Δ Q = Δ U = n C V Δ T Δ Q = 4 × 5 R 2 ( 50 ) = 500 R Hence option ( 4 ) .

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