Activation Energy

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Marni Kahn 1A
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Activation Energy

Postby Marni Kahn 1A » Tue Mar 10, 2020 11:58 am

Why can Activation energy(Ea) replace change in enthalpy(delta H) in the van't hoff equation?

Jasmine Fendi 1D
Posts: 108
Joined: Sat Aug 24, 2019 12:15 am

Re: Activation Energy

Postby Jasmine Fendi 1D » Tue Mar 10, 2020 1:24 pm

I think if it is endothermic and enthalpy tells how much energy or heat input is necessary then that is analogous to activation energy.

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Joined: Fri Aug 09, 2019 12:17 am

Re: Activation Energy

Postby lauraxie2e » Tue Mar 10, 2020 2:16 pm

Activation energy is not the same as change in enthalpy because change in enthalpy is the difference between products and reactants

Michelle Xie 2B
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Joined: Sat Aug 17, 2019 12:18 am

Re: Activation Energy

Postby Michelle Xie 2B » Tue Mar 10, 2020 11:35 pm

activation energy is not the same as change in enthalpy.

Morgan Carrington 2H
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Joined: Wed Nov 14, 2018 12:22 am

Re: Activation Energy

Postby Morgan Carrington 2H » Wed Mar 11, 2020 11:57 pm

Activation energy is different from the change in enthalpy. Activation energy is the energy necessary to overcome and break the bonds in the reactants of a reaction that occurs and the reactants only. Enthalpy is the total change in heat, including the amount of heat required to break the bonds of the reactants AND the heat released in the formation of the products.

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Re: Activation Energy

Postby CameronDis2K » Sat Mar 14, 2020 11:56 am

Activation energy and enthalpy (deltaH) both have the same units of Joules, and one deals with chemical kinetics (Ea) while the other (deltaH) deals with thermodynamics.

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