Distinguish between thermal and photochemical reaction
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Answer: thermochemical reactions:
1. these reactions involve absorbtion or evolution of heat.
2. they can take place even in absence ofr light.
3. the free energy change ΔG of a thermochemical reaction is always negative.
photochemicxal reaction:
1. these reactions involve absorbtion of light.
2. the presence of light is primary requisite for this reaction to take place.
3. the free energy change ΔG of a photochemical reaction may not be negative.
Explanation:
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