Which of these is true of a chemical reaction? Energy is always released. Energy is not transferred. Energy is always absorbed. Energy is either released or absorbed.
ankitanand77:
energy not transfered
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energy is either realesed or absorbed
Answered by
17
Among the given statements, The following is true about chemical reaction:
"Energy is either absorbed or released"
Reason :
When ever chemical reaction occurs energy changes are involved :
1. Exothermic reaction
2. Endothermic reaction
Exothermic reaction :
When ever heat is released out of chemical reaction.
eg: CaO + H2O -----------> Ca(OH)2 +heat
Endothermic reaction :
When heat absorbed during chemical reaction.
example photosynthesis occurs by absorbing light energy
Thanks so much, mate! Cheers! :3
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