🎓 IB Exam Prep

What is an exothermic reaction?

A A reaction that absorbs heat
B A reaction that releases heat to the surroundings
C A reaction with no energy change
D A reaction that only occurs at high temperatures

✓ Correct Answer: Option B

An exothermic reaction releases energy (usually as heat) to the surroundings. The enthalpy change (ΔH) is negative.

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