Question

The following data were obtained during the decomposition of SO₂Cl₂ at the constant volume. SO₂Cl₂ →SO_2(g) + Cl_2(g)

Time (s)	Total Pressure (bar)
0	0.5
100	0.6

Calculate the rate constant of the reaction.

Answer 1

Given: P_i = 0.5 bar, P = 0.6 bar, t = lOO s

∵ k = `2.303/tlog_10  (P)/(2P_i - P)`

∴ k = `2.303/100log_10 [0.5/(2 xx 0.5 - 6)]`

= `2.303/100log_10 [0.5/0.4]`

= 2.23 × 10⁻³ s⁻¹