In a reaction, mixing an acid and a base increases the solution temperature. How should this be understood?
Answer and explanation
Correct answer: Neutralisation can release heat
The reaction between an acid and a base is called neutralisation. In a typical strong-acid and strong-base reaction, hydrogen ions combine with hydroxide ions to form water, and energy is released to the surroundings: H⁺ + OH⁻ → H₂O. This released energy raises the solution temperature, so the process is exothermic in this case. The words “always absorbs” and “never react” are incorrect.
Frequently asked questions
What is the correct answer to this question?
Neutralisation can release heat
Why is this the correct answer?
The reaction between an acid and a base is called neutralisation. In a typical strong-acid and strong-base reaction, hydrogen ions combine with hydroxide ions to form water, and energy is released to the surroundings: H⁺ + OH⁻ → H₂O. This released energy raises the solution temperature, so the process is exothermic in this case. The words “always absorbs” and “never react” are incorrect.
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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