First Law

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Jarrett Peyrefitte 2K
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Joined: Sat Aug 24, 2019 12:16 am

First Law

Postby Jarrett Peyrefitte 2K » Mon Feb 03, 2020 11:02 am

What is the first law of thermodynamics? How is it used and why?

Isha_Maniyar_Dis2E
Posts: 110
Joined: Thu Jul 11, 2019 12:16 am

Re: First Law

Postby Isha_Maniyar_Dis2E » Mon Feb 03, 2020 11:04 am

The first law of thermodynamics states that energy is never removed or destroyed, it is only transferred. This is helpful because we know that if energy (q) is leaving the system, it MUST be going into the surroundings. We can also use this law to make the statement that + q = - q. This essentially states the same thing –– heat is lost from one region, but it must go into somewhere else.

Hope this helped!

sarahforman_Dis2I
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Joined: Sat Aug 17, 2019 12:18 am

Re: First Law

Postby sarahforman_Dis2I » Mon Feb 03, 2020 12:31 pm

Jarrett Peyrefitte 2K wrote:What is the first law of thermodynamics? How is it used and why?


Also, the equation for the first law of thermodynamics is
Delta U=w+q
This equation can have various ways of being expressed depending on the surroundings (whether pressure is constant ext..)

Sam McNeill 1E
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Joined: Sat Aug 24, 2019 12:17 am

Re: First Law

Postby Sam McNeill 1E » Mon Feb 03, 2020 4:59 pm

The first law mostly concerns that how in an isolated system, and how its internal energy is always constant

BCaballero_4F
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Joined: Wed Nov 14, 2018 12:22 am

Re: First Law

Postby BCaballero_4F » Mon Feb 03, 2020 9:28 pm

The 1st law of thermodynamics is conservation of energy, so the energy of an isolated system must remain constant. This gives delta u = q + w = 0

Miriam Villarreal 1J
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Joined: Sat Aug 17, 2019 12:16 am

Re: First Law

Postby Miriam Villarreal 1J » Fri Feb 07, 2020 7:52 am

states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy

Cooper Baddley 1F
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Joined: Wed Sep 18, 2019 12:19 am

Re: First Law

Postby Cooper Baddley 1F » Fri Feb 07, 2020 9:07 am

Energy is never destroyed in an isolated system just changes form. So the energy you begin with will be there in the end in some form or another.


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