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A closed vessel with rigid walls contain...

A closed vessel with rigid walls contains 1 mol of `{:(238),(92):}U and 1` mol of air at 298 K. Considering complete decay of `{:(238),(92):}U" to {:(206),(82):}Pb`, the ratio of the final pressure to the initial pressure of the system at 298 K is ___________.

Text Solution

Verified by Experts

The correct Answer is:
9
In conservation of `._(92)^(238)U` to `._(82)^(206)Pb, 8alpha`-particles and `6beta` particles are ejected.
The number of gaseous moles intially `=1` mole
The number of gaseous moles finally `=1+8` moles (1 mole from air and 8 mole of `._(2)He^(4)`)
So the ratio `=9//1=9`
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