Isolated System

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Cecilia Jardon 1I
Posts: 74
Joined: Fri Sep 28, 2018 12:16 am

Isolated System

Postby Cecilia Jardon 1I » Thu Feb 07, 2019 8:59 pm

Can someone please help with the question.
If an isolated system contained +100kJ of energy after 100 years what is delta U?

Manu Vohra 1L
Posts: 61
Joined: Wed Oct 03, 2018 12:15 am

Re: Isolated System

Postby Manu Vohra 1L » Thu Feb 07, 2019 9:30 pm

since the system is isolated, no matter or energy can be exchanged with the surroundings. Therefore, after 100 years the amount of energy in the system (the internal energy, U) will remain constant at 100kJ. Remember that DeltaU=0 for all isolated systems.

KatelinTanjuaquio 1L
Posts: 69
Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 1 time

Re: Isolated System

Postby KatelinTanjuaquio 1L » Thu Feb 07, 2019 9:50 pm

An isolated system is one in which neither matter nor energy can be exchanged with its surroundings. Delta U will be 0 because, no matter the amount of time, the change in internal energy cannot be changed in an isolated system.

Diana Bibireata 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

Re: Isolated System

Postby Diana Bibireata 1B » Thu Feb 07, 2019 10:09 pm

In an isolated system, matter and energy are not exchanged with the surroundings. Therefore the internal energy remains constant, so deltaU is 0.

Nicholas Le 4H
Posts: 74
Joined: Fri Sep 28, 2018 12:24 am

Re: Isolated System

Postby Nicholas Le 4H » Fri Feb 08, 2019 9:04 am

Delta U would be 0 due to the fact that it is an isolated system. Since it is isolated, the internal energy will remain the same.


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