Which of the following statements is true? ( Δ U = increase in internal energy, dW = work done by the system) (a) In an adiabatic process Δ U = dW (b) In an adiabatic process Δ U = -dW (c) In an isothermal process Δ U = -dW. (d) In an isothermal process Δ U = dW

Answer: (b). First law: Q = Δ U + dW. Adiabatic: Q = 0 ⇒ Δ U = -dW. Isothermal (ideal gas): Δ U = 0, so (c) and (d) fail. So the answer is (b).

Which of the following statements is true? ( Δ U = increase in… | MHT CET 2021 (22 Sep, Shift 1)

Q173MHT CET 2021 · 22 SEP · SHIFT 1Easy

Thermodynamic Processes

Which of the following statements is true?

( $\Delta U =$ increase in internal energy, $dW =$ work done by the system)

Show answer and solution

Answer: (b)

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