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More exothermic means releasing more energy when the reaction occurs. This would be a more negative value, like -3400 kJ/mol. A less exothermic reaction would release lesser heat in comparison to a more exothermic reaction. This would have a less negative value, e.g. -2000 kJ/mol is less exothermic than -3400kJ/mol.can anyone explain me the meaning of more exothermic and/or less exothermic? give me values to support explanations please.
The - sign indicates that the reaction is exothermic, rest 2000kJ is a value lesser than 3400kJ mathematically.