Suppose that 0.25 mole of gas C was added to

the mixture without changing the total pressure of

the mixture.

What is the partial pressure of C?

Pi = 0.25[P (TTL) / n (TTL) ]

Explanation:

Let Total Pressure = P (TTL) and Total moles = n (TTL) = > n (i) / n (TTL) = P (i) / P (TTL)

Given n (i) = 0.25 = > Pi = 0.25[P (TTL) / n (TTL) ]