Question

Calculate the total pressure in a mixture of 4g O₂ and 2g H₂ confined in a bulb of 1 litre at 0°C.

Answer 1

W_O2 = 4g

∴ Moles of O₂ = (4/32) = (1/8)

W_H2 = 2g

∴ Moles of H₂ = (2/2) = 1

Total moles present in mixture = (1/8 + 1) = 9/8

Volume of vessel = 1 litre

Temperature = 273 K

Now for pressure of mixture, p x v = nRT

p x 1 = (9/8) x 0.0821 x 273

∴ p = 25.215 atm.