NCEA L2 Chemistry Practice Questions - NCEA Level 2 Chemistry (New Zealand, Year 12) Exam

Which statement correctly describes an exothermic chemical reaction?

Enthalpy change ΔH is positive and heat is absorbed from surroundings. Enthalpy change ΔH is negative and heat is released to surroundings. Products have higher enthalpy than reactants. Surrounding temperature decreases as reaction proceeds.

Correct Answer:

Enthalpy change ΔH is negative and heat is released to surroundings.

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