## Changing the energy of a system

$\Delta U=q+w$

Karen Ung 2H
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### Changing the energy of a system

When you add more of an amount of a substance in a system, does it increase or descreae the energy of a system?

Alyssa Parry Disc 1H
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Joined: Sat Jul 22, 2017 3:01 am

### Re: Changing the energy of a system

I'm pretty sure it increases the amount of energy

SantanaRodriguezDis1G
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Joined: Sat Jul 22, 2017 3:00 am

### Re: Changing the energy of a system

You can also change the energy of a system by heating or cooling it( if its a closed system) and by doing work on the system (compressing a piston)

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

### Re: Changing the energy of a system

When you add more of a substance into the system, you are increasing the internal energy by increasing the potential energy.
Remember that internal energy is equal to KE + PE.

Justin Chang 2K
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Joined: Fri Sep 29, 2017 7:04 am

### Re: Changing the energy of a system

Adding more of a system increases the internal energy. Also it is good to know you cannot add/remove something from a system in a closed and isolated system.

Wilson Yeh 1L
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Joined: Fri Sep 29, 2017 7:06 am

### Re: Changing the energy of a system

The energy increases. It's also important to note that energy is required to break bonds within a system and energy is lost when bonds are formed.

Yu Chong 2H
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Joined: Fri Sep 29, 2017 7:05 am

### Re: Changing the energy of a system

Adding more substance in a system will increase the internal energy of the system, since the added amount of substance will have their own energy, that energy is added to the original system.