What will be the pressure of the gas mixture when 0.5 litre of `H_(2)` at 0.8 bar and 2.0 litre of oxygen at 0.7 bar are introduced in a 1 litre vessel at `27^(@)C` .

Options

A. 4 bar
B. 1.8 bar
C. 0.9 bar
D. 3.6 bar

Answer

B

Explanation

For `H_(2)`
`P_(1) V_(1) = P_(2) V_(2)`
`0.8 xx 0.5 = P_(4) xx 1`
`therefore P_(1) = 0.40` bar
For `O_2`
`P_(1) V_1 = P_1 V_1`
`0.7 xx 2 = P_(1) xx 1`
`P_(1) = 01.4` bar
`therefore P_(T) = P_(fH_(2)) + P_(fO_(2)) = (0.4 + 1.4) ` bar - 1.8 bar