Can you please explain how to use bond energies to determine the change in heat for reactions, or maybe post a link to a video on thermodynamics/ thermochemistry?
We use Hess's Law when we use bond energies to calculate heats of reaction.
We break all the bonds to form atoms, and then we reassemble the atoms to form new bonds.
For example, in the reaction
we break an H-H bond and a C-Cl bond and form two H-Cl bonds.
We use a table of bond energies like the one below.
and get The genera formula is Use bond energies to calculate We can ignore the C-H bonds, because they are just being broken and re-formed. Here's a video on the use of bond energies.
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To use bond energies to determine the change in heat for reactions, you first need to calculate the total bond energy of the reactants and products. Then, you subtract the total bond energy of the reactants from the total bond energy of the products. The difference represents the change in heat for the reaction.
Here is a link to a video on thermodynamics/thermochemistry: Thermochemistry: Crash Course Chemistry #20
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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