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Date November 2009 Marks available 1 Reference code 09N.1.sl.TZ0.20
Level SL Paper 1 Time zone TZ0
Command term Identify Question number 20 Adapted from N/A

Question

An increase in temperature increases the amount of chlorine present in the following equilibrium.

\[{\text{PC}}{{\text{l}}_5}({\text{s)}} \rightleftharpoons {\text{PC}}{{\text{l}}_3}({\text{l)}} + {\text{C}}{{\text{l}}_2}({\text{g)}}\]

What is the best explanation for this?

A.     The higher temperature increases the rate of the forward reaction only.

B.     The higher temperature increases the rate of the reverse reaction only.

C.     The higher temperature increases the rate of both reactions but the forward reaction is affected more than the reverse.

D.     The higher temperature increases the rate of both reactions but the reverse reaction is affected more than the forward.

Markscheme

C

Examiners report

[N/A]

Syllabus sections

Core » Topic 7: Equilibrium » 7.1 Equilibrium
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