Similarly, for component 2
p2 = p2
0 x2
(1 13)
where p2
0 represents the vapour pressure of the pure component 2 According to Dalton’s law of partial pressures, the total pressure
(
ptotal
) over the solution phase in the container will be the sum of the
 partial pressures of the components of the solution and is given as:
ptotal = p1 + p2
(1 14)
Substituting the values of p1 and p2, we get
ptotal = x1 p1
0 + x2 p2
0
= (1 – x2) p1
0 + x2 p2
0
(1