At what temperature will he atom have the same rms speed as H2 molecules have at 270C ?
1270C
3270C
2270C
270C
A
3270C
B
270C
C
1270C
D
2270C
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Solution
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The correct option is C3270C
Vrms=√3RTM⇒√3RT1MHe=√3RT2MH2
Given T1=270C=300K
T1T2=MHeMH2⇒T1=T2×MHeMH2
=300×42=600K
T2=600−273=3270C
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