If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air:
Correct answer: B. B: Decreases
- A. A: Remains constant
- B. B: Decreases
- C. C: Increases
- D. D: Remains unchanged
Explanation
Option B is correct because in an endothermic reaction, heat is absorbed from the surroundings, resulting in a decrease in the temperature of the surrounding air. Option A is incorrect because the temperature does not remain constant due to the absorption of heat. Option C is incorrect because the temperature does not increase; it decreases as the reaction absorbs heat. Option D is also incorrect because the temperature does not remain unchanged; it decreases as a result of heat absorption.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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