Winter 2015 Quiz 1

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504594108
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Winter 2015 Quiz 1

Postby 504594108 » Sun Jan 24, 2016 8:31 pm

For number 2 why does an isolated system lose internal energy if it's isolated?

Chem_Mod
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Re: Winter 2015 Quiz 1

Postby Chem_Mod » Sun Jan 24, 2016 8:46 pm

A reaction inside of an isolated system can still have a change in internal energy, from the change in entropy term (think of an ice cube melting inside of a large, isolated room--> the internal energy is changing in this case even though there is no change in work).

Andrew Phan
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Re: Winter 2015 Quiz 1

Postby Andrew Phan » Tue Jan 26, 2016 10:28 pm

It doesn't lose internal energy, delta U stands for change in internal energy and there is no change. It stays having 5kj of energy so the change or delta U is zero.


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