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1. The neutralisation reaction between ethanoic acid and sodium carbonate is an endothermic reaction - Edexcel - GCSE Chemistry - Question 1 - 2017 - Paper 1
Question 1
1. The neutralisation reaction between ethanoic acid and sodium carbonate is an endothermic reaction. Describe what is meant by the term endothermic reaction. 2. Th... show full transcript
Worked Solution & Example Answer:1. The neutralisation reaction between ethanoic acid and sodium carbonate is an endothermic reaction - Edexcel - GCSE Chemistry - Question 1 - 2017 - Paper 1
Step 1
Describe what is meant by the term endothermic reaction.
Answer
An endothermic reaction is a chemical reaction that absorbs heat energy from its surroundings. This means that the overall energy change in the reaction results in a decrease in temperature of the surroundings. When the reactants undergo the reaction, they require an input of energy to break the bonds holding them together, which leads to a net intake of thermal energy.
Step 2
Step 3
Explain, in terms of particles, why increasing the concentration of the acid increases the rate of this reaction.
Answer
Increasing the concentration of the acid results in a higher number of acid particles in the same volume. This leads to an increased frequency of collisions between the acid particles and the magnesium ribbon. More collisions per second among reactant particles enhance the likelihood of successful collisions, thus increasing the rate of the reaction.