Chemistry Question

Question

A gaseous mixture contains   and  Calculate the mole fraction,  of each of these gases.

χH2=

χN2=

χAr=

Answer 1

Total pressure x mole fraction = partial pressure

This can be written as P_t•χ = partial pressure

Rearranging, we find that χ = Partial pressure/P_t

Total pressure = 448.0 torr + 381.1 torr + 90.7 torr = 919.8 torr



χH2 = 448/919.8 = 0.487

χN2 = 381.1/919.8 = 0.414

χAr = 90.7/919.8 = 0.099