LEAP 2025 Science Grade 8 Practice Questions - LEAP 2025 Science - Grade 8 Exam

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A student mixes two liquid chemical solutions in an insulated cup. The initial temperature of both solutions is 22°C. After mixing, the solution temperature rapidly rises to 41°C. What type of reaction occurred?

An exothermic reaction that released thermal energy to the surroundings An endothermic reaction that absorbed thermal energy from the surroundings A physical phase change where liquid water converted into solid ice A nuclear decay process that destroyed all atoms in the cup

Correct Answer:

An exothermic reaction that released thermal energy to the surroundings

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