2 moles of N ₂ O ₄( ~g ) is kept in a closed container at 298 ~K and under 1 atm pressure. It is heated to 596 ~K when 20 % by mass of N ₂ O ₄( ~g ) decomposes to NO ₂ . The resulting pressure is

Step-by-step solution

array cc N ₂ O ₄ & 2 NO ₂ 1 ~mol & 92 ~g 2 ~mol & 2 92 ~g Initially 2 92-2 92 0.2 & 2 2 92 0.2 At cqulibrium =147.2 & =73.6 ~g =1.6 ~mol & =0.8 ~mol array Total moles =1.6+0.8=2.4 At constant volume, aligned P ₁ n ₁ ~T ₁ &= P ₂ n ₂ ~T ₂ 1 2 298 &= P ₂ 2.4 596 P ₂ &= 2.4 596 596 &=2.4 ~atm aligned