Exothermic and endothermic

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Madelyn Cearlock
Posts: 72
Joined: Fri Sep 28, 2018 12:19 am

Exothermic and endothermic

Postby Madelyn Cearlock » Wed Jan 23, 2019 1:20 pm

What is the difference between an endothermic reaction and an exothermic reaction?

dgerges 4H
Posts: 65
Joined: Fri Sep 28, 2018 12:24 am

Re: Exothermic and endothermic

Postby dgerges 4H » Wed Jan 23, 2019 1:22 pm

an exothermic reaction gives off energy as heat for ex. and has a low activation energy, an endothermic reaction requires more energy and will take it from the surroundings

Faith Fredlund 1H
Posts: 68
Joined: Fri Sep 28, 2018 12:18 am

Re: Exothermic and endothermic

Postby Faith Fredlund 1H » Wed Jan 23, 2019 2:56 pm

Exothermic reactions give off heat into the surrounding area.
They will result in a -ΔH.
Endothermic reactions absorb heat from the surrounding area.
They will result in a +ΔH

ΔH = Hp° - Hr°
(change in enthalpy) = (enthalpy of products) - (enthalpy of reactants)

Laura Gong 3H
Posts: 89
Joined: Fri Sep 28, 2018 12:26 am
Been upvoted: 1 time

Re: Exothermic and endothermic

Postby Laura Gong 3H » Wed Jan 23, 2019 5:49 pm

In addition to what was said above, exothermic reactions tend to make the surroundings warm as it gives off heat, while endothermic reactions tend to make the surrounds cool as it absorbs heat.


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