Edexcel IGCSE Chemistry 3.14C reaction profile diagrams

Edexcel IGCSE Chemistry syllabusChemistry 4CH1First assessment 2019

Practise reaction-profile questions by drawing energy curves, labelling Ea and ΔH, and comparing catalysed profile peaks.

How this is tested

Draw reactant and product energy levels in the correct positions for exothermic or endothermic reactions.
Label Ea from reactants to the peak and ΔH between reactant and product levels.
Compare catalysed and uncatalysed profiles using a lower activation energy peak.

[Maximum number: 3]

The equation shows one of the possible substitution reactions that occurs during the reaction between methane and chlorine.

\mathrm{CH}_{3} \mathrm{Cl}+3 \mathrm{Cl}_{2} \rightarrow \mathrm{CCl}_{4}+3 \mathrm{HCl} \quad \Delta H=-339 \mathrm{~kJ} / \mathrm{mol}

Complete the reaction profile diagram to show the levels of the reactants, the products and the activation energy, $\mathrm{E}_{\mathrm{a}}$ .

energy