endo/exothermic rxns

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Jennifer Lathrop 1F
Posts: 71
Joined: Sat Dec 02, 2017 3:00 am

endo/exothermic rxns

Postby Jennifer Lathrop 1F » Sun Jan 20, 2019 6:40 pm

Is there a way to tell if a reaction is endo or exothermic by looking at the equation?

josephperez_2C
Posts: 70
Joined: Wed Nov 15, 2017 3:04 am

Re: endo/exothermic rxns

Postby josephperez_2C » Sun Jan 20, 2019 6:44 pm

We can come to certain conclusions that are more obvious, such as H2 -> 2H being endothermic, because H2 has lower energy than the 2 H's. However, because we are given more complex chemical reactions, it's not always possible.

katie_sutton1B
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

Re: endo/exothermic rxns

Postby katie_sutton1B » Sun Jan 20, 2019 7:05 pm

Also, t the end of the equation it might give you delta H. If it is positive it is endothermic, while negative is exothermic.

904936893
Posts: 62
Joined: Fri Sep 28, 2018 12:29 am

Re: endo/exothermic rxns

Postby 904936893 » Sun Jan 20, 2019 7:08 pm

The easiest way to tell if a reaction is endothermic or exothermic is by the change in enthalpy (delta H), which I believe will be given for these types of reactions.

Jonny Schindler 1A
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

Re: endo/exothermic rxns

Postby Jonny Schindler 1A » Sun Jan 20, 2019 8:55 pm

Can you tell if a reaction is endo/exo just by the number of products vs. reactants?

Esther Lee 4H
Posts: 67
Joined: Fri Sep 28, 2018 12:29 am

Re: endo/exothermic rxns

Postby Esther Lee 4H » Sun Jan 20, 2019 9:20 pm

^^ I was also wondering if this was a possible I feel like you can depending on the complexity of the equation but what else does it rely on?


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