Chemistry · Oct / Nov 2021 · Paper 11 · Question 17
5070Exothermic and endothermic reactions
The reaction of hydrogen with chlorine to form gaseous hydrogen chloride is exothermic. Which statement is correct?
- AThe total energy of bond formation is greater than the total energy of bond breaking.
- BThe total energy of bond breaking is greater than the total energy of bond formation.
- CThe temperature of the reaction mixture falls during the reaction.
- DThe temperature of the reaction mixture remains unchanged during the reaction.
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Correct answer: A. The total energy of bond formation is greater than the total energy of bond breaking.
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