Temperature

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Sophia Dinh 1D
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Temperature

Postby Sophia Dinh 1D » Wed Jan 29, 2020 10:16 am

Is a negative delta H exothermic or endothermic?

Jason Wu 1E
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Re: Temperature

Postby Jason Wu 1E » Wed Jan 29, 2020 10:24 am

A Negative Delta H is an exothermic reaction where heat leaves the system and enters the surroundings.

805394719
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Re: Temperature

Postby 805394719 » Wed Jan 29, 2020 10:27 am

Since delta H is equal to the energy of products - reactants, if delta H is positive, the energy of the products will be larger than the energy of the reactants meaning that there is an input of energy and the reaction is endothermic. If the energy of the reactants is greater than the energy of the products, energy is given off and thus the reaction is exothermic.

Sukanya Mohapatra 2G
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Re: Temperature

Postby Sukanya Mohapatra 2G » Sun Feb 02, 2020 7:37 pm

A negative delta H would be exothermic.

KSong_1J
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Re: Temperature

Postby KSong_1J » Sun Feb 02, 2020 8:08 pm

A negative delta H is exothermic because when energy leaves a constant pressure system as heat, the enthalpy of the system decreases by that amount.

Charysa Santos 4G
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Re: Temperature

Postby Charysa Santos 4G » Sun Feb 02, 2020 8:24 pm

A negative delta H is exothermic because that means that energy is leaving (-) the system.

Samuel Tzeng 1B
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Re: Temperature

Postby Samuel Tzeng 1B » Sun Feb 02, 2020 8:29 pm

Exothermic

J_CHEN 4I
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Re: Temperature

Postby J_CHEN 4I » Sun Feb 02, 2020 8:47 pm

Since deltaH = Hfinal - Hinitial and if the reaction is exothermic (heat is released into the surroundings), then Hfinal < Hinitial (e.g. 3 kJ/mol - 4 kj/mol = -1 kJ/mol) which would yield a negative deltaH.

RasikaObla_4I
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Re: Temperature

Postby RasikaObla_4I » Sun Feb 02, 2020 8:53 pm

A negative delta H is exothermic because energy is released.

KHowe_1D
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Re: Temperature

Postby KHowe_1D » Sun Feb 02, 2020 9:25 pm

A negative delta H is exothermic because heat is being released into the surrounding environment.

Nathan Rothschild_2D
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Re: Temperature

Postby Nathan Rothschild_2D » Sun Feb 02, 2020 9:31 pm

Delta H being negative means that the reaction is giving off energy and is therefor exothermic.

Juana Abana 1G
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Re: Temperature

Postby Juana Abana 1G » Sun Feb 02, 2020 11:28 pm

A negative delta H is exothermic since energy is being released.

Sean Tran 2K
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Re: Temperature

Postby Sean Tran 2K » Sun Feb 02, 2020 11:32 pm

Negative delta H shows a release of energy, being exothermic

005162902
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Re: Temperature

Postby 005162902 » Mon Feb 03, 2020 4:23 pm

The negative in front of delta H indicates an exothermic reaction. This is because the reaction is releasing/losing heat, hence the negative sign in front of the change in enthalpy (H).

Hannah Romeo 1J
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Re: Temperature

Postby Hannah Romeo 1J » Mon Feb 03, 2020 5:02 pm

A negative delta H is exothermic as energy is released because the reactants have a higher amount of energy in comparison to the products. This results in the reaction releasing energy as the products are in a lower energy and more stable state.


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