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Question

The temperature of an ideal gas is increased from 27oC to 927oC. Then, the mean kinetic energy of gas molecules :

A
becomes 92727 times
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B
becomes 92727 times
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C
become double
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D
become four times
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Solution

The correct option is D become four times
T1=270C=300K
T2=9270C=1200K

Vrms( root mean square velocity )=3RTM

KE1=12×m×V2rms

KE2=12×m×3R×1200m

=4KE1

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