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At what temperature will the molar kinet...

At what temperature will the molar kinetic energy of 0.3 mol of He be the same as that of 0.4 mol of argon at 400 K ?

A

533 K

B

400 K

C

346 K

D

300 K

Text Solution

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The correct Answer is:
A
Total K.E `= (3)/(2) nRT rArr 0.3 xx T_(He) = 0.4 xx 400 rArr T_(He) = (1600)/(3) = 533.33 K`
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