why is heat released or absorbed in a chemical reaction
Answers
Answer:
A chemical reaction or physical change is endothermic if heat is absorbed by the system from the surroundings. In the course of an endothermic process, the system gains heat from the surroundings and so the temperature of the surroundings decreases. The quantity of heat for a process is represented by the letter q.
Answer:
If it endothermic reaction the heat is liberated or released but when it is endothermic reaction heat is absorbed .A reaction that absorbs heat is endothermic. Its enthalpy will be positive, and it will cool down its surroundings. This reaction is exothermic (negative enthalpy, release of heat). When the reaction occurs, the surroundings will increase in temperature due to the gain of heat the system releases.
Explanation:
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