The temperature rises during the reaction between an acid and a base. What does this indicate about the reaction?
Answer and explanation
Correct answer: It is an exothermic reaction
A rise in the temperature of the reacting mixture means that energy has been released as heat to the surroundings. A chemical reaction that releases heat is called an exothermic reaction. Acid-base neutralisation commonly releases heat because hydrogen ions combine with hydroxide ions to form water. The temperature observation therefore supports option A, not the claims that no reaction or only physical mixing occurs.
Frequently asked questions
What is the correct answer to this question?
It is an exothermic reaction
Why is this the correct answer?
A rise in the temperature of the reacting mixture means that energy has been released as heat to the surroundings. A chemical reaction that releases heat is called an exothermic reaction. Acid-base neutralisation commonly releases heat because hydrogen ions combine with hydroxide ions to form water. The temperature observation therefore supports option A, not the claims that no reaction or only physical mixing occurs.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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