Concepts Of Physics MCQ Edition [Volume 2]PhysicsLaws of Thermodynamics

Determine the change in the internal energy of a gas confined in a rigid container when 100 J of heat is provided to it.

Options

A0 J
B50 J
C100 J
D-100 J

Correct answer

C. 100 J

Step-by-step solution

For a rigid container, the volume of the gas remains constant, so V = 0 . The work done by the gas is W = P V = 0 . According to the first law of thermodynamics, Q = U + W . Given that the heat provided to the gas is Q = 100 J . Substituting the values, 100 = U + 0 . Therefore, the change in internal energy is U = 100 J .

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