Test question  [ENDORSED]


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mayapartha_1D
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Test question

Postby mayapartha_1D » Sun Jan 28, 2018 10:49 pm

On the test where we were supposed to state the First Law of Thermodynamics, how specific were we supposed to get with the definition?

Thanks!

Julian Krzysiak 2K
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Re: Test question

Postby Julian Krzysiak 2K » Sun Jan 28, 2018 10:53 pm

I put that the First Law of Thermodynamics states that the internal energy of an isolated system will not change. I also put just in case. Hopefully that's specific enough.

Belle Calforda3f
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Re: Test question

Postby Belle Calforda3f » Sun Jan 28, 2018 10:56 pm

The first law of thermodynamics is essentially the law of conservation of mass: matter is neither created nor destroyed. However it is super important to know that as stated by the first law of thermodynamics, the total energy of an isolated system is constant

Ilan Shavolian 1K
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Re: Test question

Postby Ilan Shavolian 1K » Sun Jan 28, 2018 11:16 pm

I said that energy cannot be created or destroyed, so i think if you said something along those lines you'll be fine. I also put the equation deltaU = q + w

Chris Pleman 3E
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Re: Test question

Postby Chris Pleman 3E » Sun Jan 28, 2018 11:27 pm

I also put the equation (delta)E(univ)= (delta)E(sys) + (delta)E(surroundings), but I'm not sure if that was redundant in lieu of stating that matter and energy are neither created nor destroyed.

604807557
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Re: Test question

Postby 604807557 » Sun Jan 28, 2018 11:46 pm

The question was pretty vague so I was also wondering how specific we were supposed to be because all I answered was that "Energy can't be created or destroyed, conservation of energy."

Ramya Lakkaraju 1B
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Re: Test question

Postby Ramya Lakkaraju 1B » Mon Jan 29, 2018 10:26 pm

I just wrote the equation, delta U = q + w.

Tim Nguyen 2J
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Re: Test question

Postby Tim Nguyen 2J » Tue Jan 30, 2018 7:27 am

Along with the equation, I also just stated that energy can neither be created nor destroyed, just transferred in various forms.

Jennie Fox 1D
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Re: Test question

Postby Jennie Fox 1D » Tue Jan 30, 2018 9:00 am

I stated that energy cannot be created nor destroyed, only transferred. I'm pretty sure that is all they would be looking for, because the First Law of Conservation is primarily concerned with the conservation of energy.

Tatiana Hage 2E
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Re: Test question

Postby Tatiana Hage 2E » Tue Jan 30, 2018 1:58 pm

The textbook says the first law of thermodynamics is that the internal energy of an isolated system is constant, so I think that would be sufficient.

Michelle Steinberg2J
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Re: Test question

Postby Michelle Steinberg2J » Tue Jan 30, 2018 2:52 pm

Ramya Lakkaraju 1B wrote:I just wrote the equation, delta U = q + w.


I also just wrote this equation. I honestly didn't even think to do any explaining. Hopefully that was sufficient!

Sarah Wax 1G
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Re: Test question

Postby Sarah Wax 1G » Sun Feb 04, 2018 10:56 pm

Yeah, I basically just put "energy can be neither created nor destroyed, only conserved." My TA told me that as long as you understood the concept, they didn't dock you for not being 100% accurate.

904940852
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Re: Test question

Postby 904940852 » Sun Feb 04, 2018 11:00 pm

Energy can not be created nor destroyed

Diane Bui 2J
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Re: Test question

Postby Diane Bui 2J » Sun Feb 04, 2018 11:02 pm

I also wrote that the internal energy of an isolated system remains constant.

Kyung_Jin_Kim_1H
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Re: Test question

Postby Kyung_Jin_Kim_1H » Mon Feb 05, 2018 1:04 am

Conservation of energy in the universe.

(I didn't even think of elaborating...)

Wenjie Dong 2E
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Re: Test question  [ENDORSED]

Postby Wenjie Dong 2E » Mon Feb 05, 2018 12:37 pm

Kyung_Jin_Kim_1H wrote:Conservation of energy in the universe.

(I didn't even think of elaborating...)


Same.

Patricia Macalalag 2E
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Re: Test question

Postby Patricia Macalalag 2E » Tue Feb 06, 2018 10:21 pm

They accepted multiple answers. Mine was "energy cannot be created or destroyed; it must be exchanged."


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