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Date May 2009 Marks available 1 Reference code 09M.1.sl.TZ1.21
Level SL Paper 1 Time zone TZ1
Command term Deduce Question number 21 Adapted from N/A

Question

Consider the following equilibrium reaction.

\[\begin{array}{*{20}{l}} {{\text{2S}}{{\text{O}}_{\text{2}}}{\text{(g)}} + {{\text{O}}_{\text{2}}}{\text{(g)}} \rightleftharpoons {\text{2S}}{{\text{O}}_{\text{3}}}{\text{(g)}}}&{\Delta {H^\Theta } = - 197{\text{ kJ}}} \end{array}\]

Which change in conditions will increase the amount of \({{\text{S}}{{\text{O}}_{\text{3}}}}\) present when equilibrium is re-established?

A.     Decreasing the concentration of \({{\text{S}}{{\text{O}}_{\text{2}}}}\)

B.     Increasing the volume

C.     Decreasing the temperature

D.     Adding a catalyst

Markscheme

C

Examiners report

[N/A]

Syllabus sections

Core » Topic 7: Equilibrium » 7.1 Equilibrium
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