Negative Enthalpy


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504939134
Posts: 103
Joined: Wed Sep 18, 2019 12:21 am

Negative Enthalpy

Postby 504939134 » Sun Feb 02, 2020 9:46 pm

Why do things that fo to a lower energy level happen by themselves?
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Emily Burghart 1k
Posts: 50
Joined: Wed Sep 18, 2019 12:17 am

Re: Negative Enthalpy

Postby Emily Burghart 1k » Sun Feb 02, 2020 9:55 pm

Are you asking about spontaneous reactions?
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Anish Natarajan 4G
Posts: 51
Joined: Thu Jul 25, 2019 12:16 am

Re: Negative Enthalpy

Postby Anish Natarajan 4G » Sun Feb 02, 2020 10:06 pm

Spontaneous reactions depend on whether or not the delta G is negative; since the equation for delta G is
deltaH-T(deltaS), then if the enthalpy is positive you can still have a negative delta G (and a spontaneous reaction) if the absolute value of T(deltaS) is greater than the enthalpy change
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Joowon Seo 3A
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: Negative Enthalpy

Postby Joowon Seo 3A » Sun Feb 02, 2020 10:32 pm

They do not necessarily happen by themselves since enthalpy is a state function. It depends on the intermediate energy when going from the initial enthalpy to the final enthalpy.
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