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Isothermal system
Posted: Wed Feb 14, 2018 2:26 pm
by Tiffany Cao 1D
Why delta S of the surroundings 0 in an isothermal, free expansion process?
Re: Isothermal system
Posted: Wed Feb 14, 2018 2:29 pm
by Curtis Tam 1J
Because the surroundings is basically a vacuum. The system is expanding but there is no heat transfer between the system and the surroundings so the surroundings basically remains unchanged.
Re: Isothermal system
Posted: Wed Feb 14, 2018 2:42 pm
by Tatiana Hage 2E
Work = 0 in free expansion because there is no external pressure applied, so P=0 and therefore w=0. Since ΔU = 0, that means that q=0 as well, so no heat is transferred into the surroundings.
Re: Isothermal system
Posted: Mon Feb 19, 2018 3:08 pm
by mayapartha_1D
Hi Tiffany!
Because q=0 as there is no transfer of heat or change in temp (isothermal) there will be no change in entropy of the molecules.
Re: Isothermal system
Posted: Tue Mar 06, 2018 8:11 am
by 704887365
Work = 0 in free expansion because there is no external pressure applied, so P=0 and therefore w=0. Since ΔU = 0, that means that q=0 as well, so no heat is transferred into the surroundings.
Re: Isothermal system
Posted: Fri Mar 16, 2018 7:16 pm
by Rishi Khettry 1L
The term free expansion implies work is = 0 and in that case q would also be zero as the deltaU value needs to remain 0