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4. What is an exothermic reaction ? Give an example.
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Explanation:
An exergonic reaction is a chemical reaction where the change in the free energy is negative (there is a net release of free energy). ... Any reaction occurring at constant temperature without input of electrical or photon energy is exergonic, according to the second law of thermodynamics.
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Answer:
The reaction for which the overall standards enthaply change Ho² is negative .
Example is ...Matching a light using a matchstick .
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