(d) Magnesium(s) +Hydrochlonca
9. What does one mean by exothermic and endothermic reactions? Give examples.
10. Why is respiration considered an exothermic reaction? Explain.
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exothermic reaction = these are a reaction in which heat is released .
eg Ch4+2O2➡️CO2+2H2O
endothermic reactions =these are the reaction in which heat is absorbed.
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