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julsineya [31]
3 years ago
9

What is the difference between endothermic and exothermic reactions?

Chemistry
2 answers:
Lunna [17]3 years ago
7 0
Endothermic is a chemical change in which heat is taken in (or absorbed).
<It starts out cold and later gets warmer>
Exothermic is a chemical change in which heat is released.
<It starts out hot, but gets cooler>
frosja888 [35]3 years ago
5 0
Endothermic take in energy.
Exothermic give out energy.


I remember it by imaging that the energy is either 'ENtering' or 'EXiting'.

Hope this helps.
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Answer:

Zero

Explanation:

Recall that;

E = q + w

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q = heat, w = work done

When heat is absorbed by the system q is positive

When heat is evolved by the system q is negative

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When work is done on the system w is positive

Step 1

ΔE1= 60 KJ + 40 KJ = 100KJ

Step 2

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Answer:

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<u>Solving</u>

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krok68 [10]

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