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Physics

Heat

Easy

Question

To what temperature should the hydrogen at 327⁰C be cooled at constant pressure, so that the root mean square velocity of its molecules become half of its previous value ?

–123⁰C
23⁰C
–100⁰C
0⁰C

The correct answer is: –123⁰C

$straight v subscript r m s end subscript equals square root of fraction numerator 3 R T over denominator M end fraction end root not stretchy rightwards double arrow straight v subscript m s end subscript proportional to square root of T$

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