CBSE Class 11-science Answered

                                                                        N₂O_4(g)                                2NO_2(g)

At start                                                 100/92 = 1.08mol                                 0

At equilibrium                                       80/92 = 0.86                                 20/46 mol= 0.43 mol

                                      According to ideal gas equation, at two condition

At 300K                           P₀V = n₀RT₀

                                         1 × V = 1.08 × R × 300      -------------- (i)

At 600K                        P₁V = n₁RT₁

                                      P₁ × V  = (0.86 + 0.43) × R ×600 ------------(ii)

Divide (ii) by (i)

P₁  =  1.29  ×  600

           1.08 × 300

P₁ = 1.29  ×  2  =  2.38 atm

           1.08