## Isolated// Energy

kennedyp
Posts: 56
Joined: Tue Nov 13, 2018 12:18 am

### Isolated// Energy

Can an isolated system have a change in energy?

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

### Re: Isolated// Energy

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
Posts: 103
Joined: Wed Sep 18, 2019 12:21 am

### Re: Isolated// Energy

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

An isolated system has no transfer of matter or energy.
From the equation $\Delta U=q+w$, 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

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
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

### Re: Isolated// Energy

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

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

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

Dan M -3E
Posts: 101
Joined: Wed Sep 18, 2019 12:19 am

### Re: Isolated// Energy

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

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

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

EvanWang
Posts: 101
Joined: Sat Sep 07, 2019 12:16 am

### Re: Isolated// Energy

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.