In this question the gases are reactive and we can not apply dalton's law of partial pressure, but in ncert - Chemistry - States of Matter

Question

In this question the gases are reactive and we can not apply
dalton's law of partial pressure, but in ncert book, its answer has
been calculated by using dalton's law of partial pressure Please
clarify this doubt and pls tell which is the right way to solve

Ravjot Kaur · Accepted Answer

Dear student
The steps shown below give the answer, You need not calculate the individual partial pressures and then add them. Here the individual no.of moles need to be added up to give the final value of n

Given,

Mass of dihydrogen (H2) = 4 g Thus, number of moles of

Therefore, total number of moles in the mixture = 0 25 + 2 = 2 25 mole Given, V = 1 dm3 n = 2 25 mol R = 0 083 bar dm3 K–1 mol–1 T = 27°C = 300 K Total pressure (p) can be calculated as: pV = nRT

Hence, the total pressure of the mixture is 56 025 bar Regards

In this question the gases are reactive and we can not apply dalton's law of partial pressure, but in ncert book, its answer has been calculated by using dalton's law of partial pressure. Please clarify this doubt and pls tell which is the right way to solve....