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MHT CET 2026 (18 Apr, Shift 1) · Thermodynamic Processes

Thermodynamic Processes question from MHT CET 2026 (18 Apr, Shift 1)

Q20MHT CET 2026 · 18 APR · SHIFT 1Medium

Thermodynamic Processes

The r.m.s. speed of hydrogen at S.T.P. is ' $u$ ' m/s. If the gas is heated at constant pressure till its volume becomes three times, the final temperature of the gas and the r.m.s. speed are respectively

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Answer: (c)

At constant pressure $V \propto T$ : $T_2 = 3 \times 273 = 819\text{ K}$ .
$v_{rms} = \sqrt{\dfrac{3RT}{M}} \propto \sqrt{T}$ , so $v_2 = \sqrt{3}\,u$ .
So the answer is (c) $819$ K, $\sqrt{3}\,u$ m/s.

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