Isolated// Energy

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kennedyp
Posts: 56
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Isolated// Energy

Postby kennedyp » Thu Jan 30, 2020 4:51 pm

Can an isolated system have a change in energy?

Daniel Honeychurch1C
Posts: 109
Joined: Thu Jul 11, 2019 12:15 am

Re: Isolated// Energy

Postby Daniel Honeychurch1C » Thu Jan 30, 2020 5:02 pm

In an isolated system, matter and energy cannot be exchanged between the system and the environment. Therefore, the total energy in an isolated system cannot change.

Anthony Hatashita 4H
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Re: Isolated// Energy

Postby Anthony Hatashita 4H » Thu Jan 30, 2020 7:57 pm

There can be reactions that happen within the isolated system, but no energy can leave or enter the system.

Sebastian Lee 1L
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Re: Isolated// Energy

Postby Sebastian Lee 1L » Thu Jan 30, 2020 8:35 pm

An isolated system has no transfer of matter or energy.
From the equation , it should make sense that the change in internal energy of an isolated system will be 0 because there is no heat transfer (energy) and no work being done (also energy).

Eva Zhao 4I
Posts: 101
Joined: Sun Sep 29, 2019 12:16 am

Re: Isolated// Energy

Postby Eva Zhao 4I » Mon Feb 03, 2020 1:38 pm

No, in an isolated system there can be no exchange of energy with the surrounding. The combustion of glucose in a bomb calorimeter is an example. To clarify, a closed system can have energy exchange with surroundings by heating/cooling or compression/expansion.

005162902
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Re: Isolated// Energy

Postby 005162902 » Mon Feb 03, 2020 11:06 pm

No because it cannot exchange energy with the surrounding environment because it is closed off.

105335337
Posts: 103
Joined: Sat Aug 24, 2019 12:15 am

Re: Isolated// Energy

Postby 105335337 » Mon Feb 03, 2020 11:27 pm

For the system as a whole, there cannot be an exchange in energy because its isolated so the energy is constant.

Maika Ngoie 1B
Posts: 97
Joined: Fri Aug 02, 2019 12:16 am

Re: Isolated// Energy

Postby Maika Ngoie 1B » Sun Feb 09, 2020 7:30 pm

No, neither energy nor matter can be transferred between a system and surroundings in an isolated system.

Dan M -3E
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Re: Isolated// Energy

Postby Dan M -3E » Sun Feb 09, 2020 9:17 pm

Energy of a isolated system is always conserved (1st law), so even in an isolated system as big as the entire universe, the overall change in energy is 0

Andrea_Torres
Posts: 98
Joined: Sun Sep 15, 2019 12:15 am

Re: Isolated// Energy

Postby Andrea_Torres » Sun Feb 09, 2020 9:27 pm

Since an isolated system has no exchanges with its surroundings, this means that the isolated system can not have a change in energy.

Veronica Lu 2H
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Re: Isolated// Energy

Postby Veronica Lu 2H » Sun Feb 09, 2020 9:40 pm

There is no change in energy in an isolated system since there is no interaction with the outside environment

EvanWang
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Joined: Sat Sep 07, 2019 12:16 am

Re: Isolated// Energy

Postby EvanWang » Sun Feb 09, 2020 9:41 pm

No, because the definition of an isolated system is that no energy is exchanged with the environment. This includes heat and work. Consider it like a thermally-insulated and rigid bomb calorimeter.


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