First law of thermodynamics


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Jina Kwon
Posts: 100
Joined: Fri Aug 09, 2019 12:15 am

First law of thermodynamics

Postby Jina Kwon » Sun Feb 02, 2020 11:09 am

How does the equation U = qp + w directly relate to the First law of Thermodynamics?

Suraj Doshi 2G
Posts: 100
Joined: Fri Aug 02, 2019 12:15 am

Re: First law of thermodynamics

Postby Suraj Doshi 2G » Sun Feb 02, 2020 11:47 am

Since q is net heat gain/lost and w is net work done (either on or by the system) we can see that energy will be conserved through a totality of calculations done as either heat or work.

Matt F
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

Re: First law of thermodynamics

Postby Matt F » Sun Feb 02, 2020 2:28 pm

The First Law of Thermodynamics says that for a closed system, internal energy (delta U) changes as a function of heat (q) and work (w). This is laid out in the equation delta U = q + w. Note however that this does not fully describe a system, since we also need entropy to know the probability of being in a particular state

lauraxie2e
Posts: 108
Joined: Fri Aug 09, 2019 12:17 am

Re: First law of thermodynamics

Postby lauraxie2e » Sun Feb 02, 2020 7:56 pm

Q is heat gained or lost and W is work done so combined they create the energy of the system


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