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One gram mole of oxygen at 27^@ and one ...

One gram mole of oxygen at `27^@` and one atmospheric pressure is enclosed in vessel.
(i) Assuming the molecules to be moving the `V_(rms)`, Find the number of collisions per second which the molecules make with one square metre area of the vessel wall.
(ii) The vessel is next thermally insulated and moved with a constant speed `V_0`. It is then suddenly stopped. The process results in a rise of the temperature of the gas by `1^@C`. Calculate the speed `V_0`.

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The correct Answer is:
`2.95xx10^(27)`
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