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5 cards from this section. Quick, good the night before a test.
Define an exothermic reaction.
Think about what happens when something burns.
What is activation energy?
Consider the energy needed to kickstart a reaction.
What type of reaction absorbs energy?
Think of photosynthesis.
True or False: Exothermic reactions have a positive enthalpy change (ΔH).
Recall the definition of exothermic.
A chemical reaction is said to have an activation energy of 50 kJ. During the reaction, it releases 150 kJ. What type of reaction is this?
Consider both what happens to energy before and after.
In an experiment, a student finds that when 200g of a reactant absorbs 80 kJ of energy, the reaction is classified as what type? Show your explanation.
Link the energy absorption with the type of reaction.
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