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Heating/Cooling A System

Posted: Wed Jan 17, 2018 10:55 pm
by Aya Shokair- Dis 2H
In class today, Dc. Lavelle said that there are three ways to change the energy of a system.
One of the ways was to heat or cool the system and he specifically referred to closed systems.
Can this idea be used on open systems as well?
Or would the added heat be released to the surroundings bc it isn't adiabatic. Thus it would fail as a way to change the E of the system?

Re: Heating/Cooling A System

Posted: Wed Jan 17, 2018 11:14 pm
by Lindsay Kester 2L
Because an open system is connected to its surroundings, any heat added would be dispersed throughout its surroundings, so the total E of the system would remain the same. Therefore, it wouldn't work as a way to add energy to a system.

Re: Heating/Cooling A System

Posted: Sat Jan 20, 2018 7:15 pm
by Yixin Angela Wang 2H
Then how would you be able to add energy to an open system?

Re: Heating/Cooling A System

Posted: Sat Jan 20, 2018 7:26 pm
by SitharaMenon2B
You can add energy to an open system by doing work on the system.

Re: Heating/Cooling A System

Posted: Sun Jan 21, 2018 7:04 pm
by Aya Shokair- Dis 2H
I think the only way you can add energy to an open system is by adding or removing the amount of substance.
For example, adding 1 gram of glucose to a system with 9 grams of glucose increases the potential energy.