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The partial pressure of ethane over a so...

The partial pressure of ethane over a solution containing `6.56xx10^(-2) g` of ethane is 1 bar. If the solution contains `5.00xx10^(-2) g` of ethane, then the partial pressure of the ethane gas will be

A

0. 762 bar

B

0.895 bar

C

0.653 bar

D

0.540 bar

Text Solution

Verified by Experts

The correct Answer is:
1
According to Henry's law, the solubility of a gas in water aquals `KP`. Thus
`m=KP`
`m_(1)=KP_(1)`
`m_(2)=KP_(2)`
or `m_(1)/m_(2)=P_(1)/P_(2)`

`m_(1) = 6.56xx10^(-2)g, m_(2) = 5.00xx10^(-2)g, P_(1) = 1 "bar" ,P_(2) = ?`
Thus
`P_(2)=m_(2)/m_(1)xxP_(1)`
Substituting the values we get
`P_(2)=(5.00xx10^(-2)g)/(6.56xx10^(-2)g)xx1` bar = 0.762 bar
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