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In a thermodynamic system, W represents the work done by the system and ΔU is the increase in internal energy. Which of the following statements is true?

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Question

In a thermodynamic system, W represents the work done by the system and ΔU is the increase in internal energy. Which of the following statements is true?

Options

  • In an isothermal process, ΔU = -W

  • In an adiabatic process, ΔU = -W

  • In an isothermal process, ΔU = W

  • In an adiabatic process, ΔU = W

MCQ
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Solution

In an adiabatic process, ΔU = -W

Explanation:

According to the first law of thermodynamics,

Q = ΔU + W

In adiabatic process, Q = 0

∴ ΔU = -W

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