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endo/exothermic rxns

Posted: Sun Jan 20, 2019 6:40 pm
by Jennifer Lathrop 1F
Is there a way to tell if a reaction is endo or exothermic by looking at the equation?

Re: endo/exothermic rxns

Posted: Sun Jan 20, 2019 6:44 pm
by josephperez_2C
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.

Re: endo/exothermic rxns

Posted: Sun Jan 20, 2019 7:05 pm
by katie_sutton1B
Also, t the end of the equation it might give you delta H. If it is positive it is endothermic, while negative is exothermic.

Re: endo/exothermic rxns

Posted: Sun Jan 20, 2019 7:08 pm
by 904936893
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.

Re: endo/exothermic rxns

Posted: Sun Jan 20, 2019 8:55 pm
by Jonny Schindler 1A
Can you tell if a reaction is endo/exo just by the number of products vs. reactants?

Re: endo/exothermic rxns

Posted: Sun Jan 20, 2019 9:20 pm
by Esther Lee 4H
^^ 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?