Enthalpy in a System

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Sebastian Hurtado 1J
Posts: 42
Joined: Fri Sep 25, 2015 3:00 am

Enthalpy in a System

Postby Sebastian Hurtado 1J » Mon Jan 18, 2016 3:20 pm

Why is that q(system)+q(surroundings)=0 in a system? Is this only true when certain conditions are present, such as a constant volume or pressure? Or is it always true?

Shweta Chawla 2D
Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

Re: Enthalpy in a System

Postby Shweta Chawla 2D » Mon Jan 18, 2016 3:23 pm

The total enthalpy must be conserved, so energy lost by the system/gained by the system is then absorbed by the surroundings/is from energy released from the surroundings, leading the final value to be a constant, in this case 0.

Isa AbdulCader 3K
Posts: 18
Joined: Fri Sep 25, 2015 3:00 am

Re: Enthalpy in a System

Postby Isa AbdulCader 3K » Wed Jan 20, 2016 2:12 pm

It is similar to the law of conservation of energy, in that the energy transfered (from surroundings to system or vice versa) has to be equal to the energy lost in that process.


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