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Question

The kinetic energy for 14 grams of nitrogen gas at 1270C is nearly (mol. mass of nitrogen = 28 and gas constant = 8.31 JK1mol1)

A
1230 J
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B
4015 J
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C
2493 J
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D
990 J
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Solution

The correct option is B 2493 J
KE=32nRT n=1428=0.5
=32×0.5×8.314×(127+273)
=2494.2J

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