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Exothermic and Endothermic Reactions

Posted: Sun Jan 19, 2020 3:12 pm
by Jasmine 2C
Are all reactions exothermic or endothermic, whether slightly or strongly exo/endothermic? And on this topic, are all reactions with a positive delta H going to be endothermic and all reactions with a negative delta H going to be exothermic, despite forming or breaking bonds during the reaction?

Re: Exothermic and Endothermic Reactions

Posted: Sun Jan 19, 2020 3:23 pm
by Andrew Pfeiffer 2E
Yes and yes! You got it.

Re: Exothermic and Endothermic Reactions

Posted: Sun Jan 19, 2020 3:25 pm
by AveryAgosto
Every reaction is either exothermic or endothermic. You are correct about the relationship to delta H

Re: Exothermic and Endothermic Reactions

Posted: Sun Jan 19, 2020 3:31 pm
by Anokhi Patel 2B
Negative delta H means the loss of energy, negative delta H reaction is endothermic since heat is required to instigate the reaction. Likewise, it goes for positive delta H and exothermic reactions.

Re: Exothermic and Endothermic Reactions

Posted: Sun Jan 19, 2020 11:01 pm
by ASetlur_1G
Will we always be give delta H to tell if a reaction is endothermic or exothermic? If not, how do we tell?

Re: Exothermic and Endothermic Reactions

Posted: Sun Jan 19, 2020 11:10 pm
by Sydney Myers 4I
It's true that breaking bonds releases energy, but only apply this when the breaking of a single bond in a very simple reaction. Otherwise there are too many factors to simplify to just breaking or forming bonds.