Enthalpy at Constant Pressure

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eduardomorales5
Posts: 77
Joined: Fri Aug 30, 2019 12:15 am

Enthalpy at Constant Pressure

Postby eduardomorales5 » Thu Jan 30, 2020 9:03 pm

Is enthalpy at constant pressure mean that the system has to be at 1.0atm and 25 degrees celsius? Or is it simply that it should be at 25 degrees celsius?

AArmellini_1I
Posts: 107
Joined: Fri Aug 09, 2019 12:15 am

Re: Enthalpy at Constant Pressure

Postby AArmellini_1I » Thu Jan 30, 2020 9:41 pm

I believe it just means that its a closed system (like a piston) so while volume may change the pressure will never change because the system can expand and contract

Qiu Ya Wu 4I
Posts: 107
Joined: Fri Sep 20, 2019 12:17 am

Re: Enthalpy at Constant Pressure

Postby Qiu Ya Wu 4I » Thu Jan 30, 2020 9:50 pm

Enthalpy at constant pressure is referring to essentially an open system with an air pressure of 1.0 atm. With an open system, the gas has the ability to push the air on top of the beaker out of the way, therefore performing work onto it.


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