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JEE Main 2026 (21 Jan, Shift 2) · Thermodynamic Processes

Thermodynamic Processes question from JEE Main 2026 (21 Jan, Shift 2)

Q13JEE Main 2026 · 21 JAN · SHIFT 2Medium

Thermodynamic Processes

A diatomic gas (γ=1.4)(\gamma = 1.4) does 100 J of work when it is expanded isobarically. Then the heat given to the gas ______ J.

Numerical answer type. Work it out, then open the answer.

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Answer: 350

  1. Isobaric: QW=CpR=γγ−1=1.40.4=3.5\dfrac{Q}{W} = \dfrac{C_p}{R} = \dfrac{\gamma}{\gamma - 1} = \dfrac{1.4}{0.4} = 3.5
  2. Q=3.5×100=350 JQ = 3.5 \times 100 = 350\text{ J}
  3. Heat given =350 J= 350\text{ J}.
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