General Science • ChemistryMedium
Which of the following is an example of an endothermic reaction?
A. Burning of coal
B. Respiration
C. Dissolution of ammonium chloride in water✓ Correct Answer
D. Neutralization of acid and base
💡 Solution & Explanation
The dissolution of ammonium chloride in water is an endothermic process because it absorbs thermal energy from its surroundings, resulting in a noticeable drop in solution temperature. Processes like coal combustion and cellular respiration are exothermic as they release heat energy into the environment. Endothermic reactions feature a positive enthalpy change during phase or chemical transformations.
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