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Entropy

Posted: Thu Jan 26, 2017 11:59 pm
by Bola_G_3H
What effect does the being reversible vs irreversible have on entropy? How would you calculate both?

Re: Entropy

Posted: Sat Jan 28, 2017 12:47 am
by Kathy Vu 3L
Irreversible processes cause a change in entropy, whereas reversible processes have an entropy change of 0.

Re: Entropy

Posted: Sat Jan 28, 2017 1:54 am
by stephanieyang_3F
Kathy can you explain what you mean by that? What kind of example should we refer to understand that concept?

Re: Entropy

Posted: Sat Jan 28, 2017 9:07 pm
by Maddy_Larson_2J
If entropy is always increasing, then in a non-spontaneous reaction what part of the reaction relates to the increase in entropy if we are using work to create order?

Re: Entropy

Posted: Sat Jan 28, 2017 9:58 pm
by Emma Cole 3F
I understand that with a more massive substance, the higher the entropy. But, how can you distinguish in the level of entropy between a solid, a liquid, and a gas of the same substance?

Re: Entropy

Posted: Sat Jan 28, 2017 10:29 pm
by stephanieyang_3F
Usually entropy increases from solid -> liquid -> gas because there's more disorder associated with a gas (molecules are free to move around and are not bounded) compared to that of a solid (molecules are in rigid structures).

Re: Entropy

Posted: Sat Jan 28, 2017 11:17 pm
by shreya_mantri_3I
Does anyone know what effect does pressure have on entropy?

Re: Entropy

Posted: Sat Jan 28, 2017 11:40 pm
by stephanieyang_3F
A higher pressure would mean that a substance is more constricted to move around. The entropy would therefore be less when the pressure increases.