1.

The partial pressure of ethane over a solution containing 6.56 xx10^(-3) g of ethane is 1 bar. If thesolution contains 5.00 xx 10^(-2)g of ethane, then what shall be the partial pressure of the gas ?

Answer»

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SOLUTION : Applying the relationship `m = K_Hxx p` (Henry.s law)
In the first case, `6.56 xx 10^(-2) g = K_H X `
1 bar or `K_H = 6.56 xx 10^(-2)g "bar"^(-1)`
Let the PARTIAL pressure in the second case be p.
In the second case, `5.00 xx 10^(-2) g = (6.56 xx 10^(-2) g "bar"^(-1)) xxp`
`p = (5.00 xx 10^(-2) g)/(6.56 xx 10^(-2) g "bar"^(-1)) = 0.762` bar


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