Heating/Cooling A System

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Aya Shokair- Dis 2H
Posts: 58
Joined: Fri Sep 29, 2017 7:07 am

Heating/Cooling A System

Postby Aya Shokair- Dis 2H » Wed Jan 17, 2018 10:55 pm

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?

Lindsay Kester 2L
Posts: 29
Joined: Thu Jul 27, 2017 3:00 am

Re: Heating/Cooling A System

Postby Lindsay Kester 2L » Wed Jan 17, 2018 11:14 pm

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.

Yixin Angela Wang 2H
Posts: 51
Joined: Thu Jul 27, 2017 3:00 am

Re: Heating/Cooling A System

Postby Yixin Angela Wang 2H » Sat Jan 20, 2018 7:15 pm

Then how would you be able to add energy to an open system?

SitharaMenon2B
Posts: 50
Joined: Thu Jul 27, 2017 3:01 am

Re: Heating/Cooling A System

Postby SitharaMenon2B » Sat Jan 20, 2018 7:26 pm

You can add energy to an open system by doing work on the system.

Aya Shokair- Dis 2H
Posts: 58
Joined: Fri Sep 29, 2017 7:07 am

Re: Heating/Cooling A System

Postby Aya Shokair- Dis 2H » Sun Jan 21, 2018 7:04 pm

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.


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