Question

The following data were obtained during the first order thermal decomposition of SO₂Cl₂ at a constant volume:

SO₂Cl₂(g) → SO₂(g) + Cl₂(g)

Experiment	Time/s-1	Total pressure/atm
1	0	0.4
2	100	0.7

Calculate the rate constant. 

[Given :log 4 = 0.6021,log 2 = 0.3010]

Answer 1

SO₂Cl₂(g) → SO₂(g) + Cl₂(g)

At t = 0s 0.4 atm     0 atm     0 atm

At t = 100s (0.4 - x) atm      x atm    x atm

=> pt = 0.4 - x + x + x

=> pt = 0.4 + x

=> 0.7 = 0.4 + x

.^. .  x = 0.3