BurningBush
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I don't understand anyyything about Hess's Law and no amount of reading and you tube videos seems to help.
can someone please explain Hess's Law the way I can understand it?
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charco
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(Original post by BurningBush)
I don't understand anyyything about Hess's Law and no amount of reading and you tube videos seems to help.
can someone please explain Hess's Law the way I can understand it?
Hess' law is just the law of conservation of energy.

Chemical systems have both thermal energy and chemical potential energy and the sum of both of these MUST be conserved in any process/reaction.

This means that as heat is given out or absorbed in chemical reactions, the CPE must change. The law of conservation of energy allows us to apply the four rules of number to chemical processes in terms of energy.

Check out this video

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BurningBush
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thank you so much!
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scimus63
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Hi,

Not sure if another website will help but try this

https://www.science-revision.co.uk/A...#39;s_law.html

there are some worked examples in the questions to answer bit
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