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AP EAMCET202319 May 2023Morning ShiftPhysicsThermodynamicsActual

The change in internal energy when 20 ~g of a gas is heated from 25^ C to 35^ C at constant volume is (Specific heat capacity of the gas at constant volume

Options

  1. A74 ~J
  2. B336 ~J
  3. C136 ~J
  4. D168 ~J

Correct answer

D. 168 ~J

Step-by-step solution

Mass of gas, m =20 ~g Change in temperature, T =35^ C -25^ C =10^ C Specific heat capacity of the gas. C _ v =0.2 cal g ⁻¹ ^ C ⁻¹ The change in internal energy is given by aligned & Q = U = mC _ v T & ( V =0 ; W =0) & =20 0.2 10 4.200=168 ~J aligned

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