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Question

If the vapour behaves ideally at 1000 K, determine the average translational kinetic energy of a molecule.

A
1.07×1021J
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B
1.07×1020J
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C
2.07×1021J
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D
2.07×1020J
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Solution

The correct option is D 2.07×1020J
Average kinetic energy of a molecule,
¯Ek=32kBT where,kB=Boltzmann constant
=32×1.38×1023×1000 J=2.07×1020J

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