During dilution of an acid, the outer surface of the glass container feels hot. What type of process does this show?
Answer and explanation
Correct answer: Exothermic process
An exothermic process releases heat to the surroundings. During dilution, ions of a concentrated acid become hydrated as the acid mixes with water, and considerable heat may be released. This warms the glass container, so option A is correct. An endothermic process would absorb heat and produce cooling; evaporation and crystallisation do not describe the main heat change in this dilution. For safety, acid must be added slowly to water.
Frequently asked questions
What is the correct answer to this question?
Exothermic process
Why is this the correct answer?
An exothermic process releases heat to the surroundings. During dilution, ions of a concentrated acid become hydrated as the acid mixes with water, and considerable heat may be released. This warms the glass container, so option A is correct. An endothermic process would absorb heat and produce cooling; evaporation and crystallisation do not describe the main heat change in this dilution. For safety, acid must be added slowly to water.
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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
