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connie 2C
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Joined: Thu Jul 11, 2019 12:17 am


Postby connie 2C » Mon Feb 03, 2020 10:43 pm

what is internal energy? i don't understand the concept of why q + w equals the change in internal energy

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

Re: defintion

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

internal energy is the total energy of a closed system. Because the closed system doesn't get energy from its surroundings, internal energy is made up of the potential and kinetic energy the closed system has.

Omar Selim 1D
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Joined: Sat Jul 20, 2019 12:16 am

Re: defintion

Postby Omar Selim 1D » Tue Feb 04, 2020 12:51 am

Internal energy is just the energy found within a system without any interference from the world beyond. It is the concept of energy only being from the kinetic and potential energy already found within a system

Lauren Tanaka 1A
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Joined: Sat Aug 17, 2019 12:18 am

Re: defintion

Postby Lauren Tanaka 1A » Tue Feb 04, 2020 12:06 pm

The internal energy or ∆U is the energy found in the system or the total energy of a closed system. This can be found using the equation ∆U = q + w where q is heat and w is the amount of work.

Kayli Choy 2F
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Joined: Sat Aug 24, 2019 12:17 am

Re: defintion

Postby Kayli Choy 2F » Wed Feb 05, 2020 1:34 pm

Additionally for this equation, if you need to find work and you are given pressure and change in volume, w = -Pexternal(delta V), and you can substitute this in for w in the larger equation of delta U = q + w. If q = 0, no heat is being added, and if w = 0, no work is being done on the system.

LNgo 1G
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Joined: Sat Aug 24, 2019 12:16 am

Re: defintion

Postby LNgo 1G » Wed Feb 05, 2020 1:39 pm

The energy from heat being added to the system is represented by q, while w represents the energy leaving the system due to work.

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Joined: Mon Jun 17, 2019 7:24 am

Re: defintion

Postby 605395381 » Wed Feb 05, 2020 5:15 pm

Internal energy is the total energy found in a system which is, as defined by the equation, the sum of heat plus work (a form of energy)

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