Why does the container become hot when acid is dissolved in water?
Answer and explanation
Correct answer: Because heat is released
Dissolving or diluting a concentrated acid in water is generally exothermic: hydration of ions and other interactions release energy as heat. That released heat raises the temperature of the solution and may warm the container. Option A is correct. Heat is not completely removed, water does not become a metal, and the effect is not caused by acid simply stopping gas formation. For safety, acid should be added slowly to water while stirring.
Frequently asked questions
What is the correct answer to this question?
Because heat is released
Why is this the correct answer?
Dissolving or diluting a concentrated acid in water is generally exothermic: hydration of ions and other interactions release energy as heat. That released heat raises the temperature of the solution and may warm the container. Option A is correct. Heat is not completely removed, water does not become a metal, and the effect is not caused by acid simply stopping gas formation. For safety, acid should be added slowly to water while stirring.
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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