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MHT CET 2024 (15 May, Shift 2) · Pressure & Kinetic Energy of a Gas

Pressure & Kinetic Energy of a Gas question from MHT CET 2024 (15 May, Shift 2)

Q15MHT CET 2024 · 15 MAY · SHIFT 2Medium

Pressure & Kinetic Energy of a Gas

In an ideal gas at temperature TT, the average force that a molecule applies on the walls of a closed container depends on TT as TxT^{x}. The value of xx is

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Answer: (d)

  1. Force by a molecule = change of momentum per collision × collision rate: F∝(2mv)(v2L)∝mv2F \propto (2mv)\left(\frac{v}{2L}\right) \propto mv^2.
  2. mv2∝Tmv^2 \propto T, so F∝T1F \propto T^{1}.
  3. So the answer is (d) 1.
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