O-LevelChemistryRates of Reaction5070/11 · May/June 2023 · Q121 Mark
Which statements about the energy changes during a chemical reaction are correct? 1 The activation energy, Ea, is the maximum energy the colliding particles must have in order to react. 2 During an endothermic reaction, thermal energy is taken in from the surroundings leading to a decrease in the temperature of the surroundings. 3 The making of chemical bonds is an exothermic process.
A1 and 2 only
B1 and 3 only
C2 and 3 only
D1, 2 and 3
✓ Correct answer
C: 2 and 3 only
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