Science Coordinate 0654: C6. Energy changes in chemical reactions Topical Past Paper Questions
Cambridge IGCSE Science Coordinate (0654) past-paper questions on C6. Energy changes in chemical reactions, free. This topic is frequently examined across 23 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
A student investigates the temperature changes when substances dissolve in water. ## (a) Procedure The student: - uses a measuring cylinder to add 25cm $ ^{3} $ of water to a boiling tube • records, in Table 3.1, the initial temperature of the water • adds some potassium carbonat…
A student investigates the decomposition of hydrogen peroxide, $ H_{2}O_{2} $. The equation for the reaction is shown. $$ 2\mathrm{H}_{2}\mathrm{O}_{2}(aq)\rightarrow2\mathrm{H}_{2}\mathrm{O}(\mathrm{l})+\mathrm{O}_{2}(\mathrm{g}) $$ (a) Describe a test and its positive result to…
A reaction is carried out at two different temperatures. Which statement about the reaction at the higher temperature is not correct? A greater proportion of reacting particles possess the activation energy. B Reacting particles collide more frequently. C Reacting particles have…
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