Closed system

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WeiyangXiong1B
Posts: 11
Joined: Mon Jan 26, 2015 2:17 pm

Closed system

Postby WeiyangXiong1B » Sat Feb 06, 2016 11:15 am

Why is a LED lightbulb a closed system?

Chem_Mod
Posts: 17949
Joined: Thu Aug 04, 2011 1:53 pm
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Re: Closed system

Postby Chem_Mod » Sat Feb 06, 2016 4:32 pm

Because matters cannot be exchanged. The bulb is sealed completely. However, energy can still be exchanged.

GregoryPolyakov_1H
Posts: 16
Joined: Wed Sep 21, 2016 2:56 pm

Re: Closed system

Postby GregoryPolyakov_1H » Fri Jan 13, 2017 2:42 pm

But in trying to calculate something, do we assume the system is closed or isolated?

Josephine_Tang_1N
Posts: 30
Joined: Wed Sep 21, 2016 2:57 pm

Re: Closed system

Postby Josephine_Tang_1N » Fri Jan 13, 2017 3:56 pm

I would assume the system is isolated because thermodynamic problems calculate changes in energy


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