wiz-icon
MyQuestionIcon
MyQuestionIcon
4
You visited us 4 times! Enjoying our articles? Unlock Full Access!
Question

The mass of hydrogen molecule is 3.32×1027 kg. If 1023 hydrogen molecules strike per second at 2 cm2 area of rigid wall of a close container normally and rebound back with the speed of 1000 m/s, then the pressure exerted on the wall (according to kinetic theory of gas) is

A
3000 N/m2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
6640 N/m2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
8320 N/m2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
3320 N/m2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 3320 N/m2
According to kinetic theory, collision between molecules and wall of container is perfectly elastic.
Change in momentum,
|(ΔP)|=PfPi=2mv
where v is rebound velocity of molecule
We know that
F=ΔPΔt
Force exerted by 1 molecule in 1 sec
F1=2mv N
Force exerted by 1023 molecule in 1 sec
=2mv×1023 N
Pressure exerted by 1023 molecule
=2×mv×1023Area
=2×m×v×10232×104 m2
=2×3.32×1027×103×10232×104
=3320 N/m2

flag
Suggest Corrections
thumbs-up
15
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon