Science Combined 0653: C6. Energy changes in chemical reactions Topical Past Paper Questions
Cambridge IGCSE Science Combined (0653) past-paper questions on C6. Energy changes in chemical reactions, free. This topic is frequently examined across 26 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
A student investigates the temperature increase when aqueous sodium hydroxide is added to dilute hydrochloric acid. ## (a) Procedure The student: step 1 measures the temperature of a large volume of dilute hydrochloric acid step 2 pours 20.0 cm $ ^{3} $ of the dilute hydrochloric…
Solid citric acid is added to aqueous sodium hydrogencarbonate. There is a reaction and the temperature of the aqueous sodium hydrogencarbonate decreases. Plan an investigation to determine the relationship between the mass of citric acid added to the aqueous sodium hydrogencarbo…
Lithium is an element in Group I of the Periodic Table. (a) An atom of lithium is represented as shown. Complete Table 2.1 to show the number of protons, electrons and neutrons in one atom of $ {}^{7}_{3}Li $. Table 2.1 (b) Describe what happens when an atom of lithium becomes an…
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