PChem312 f20 w13

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Monday, Nov 9, 2020

We will now highlight how to calculate entropy (ΔS) for four processes involving ideal gases:

Screen Shot 2020-11-09 at 8.42.24 AM.png

1) Reversible Isothermal Expansion or Compression

ViTi-->VfTi

2) Constant P, V temperature change

ViTi-->ViTf
PiTi-->PiTf

3) Changes in both V and T, constant P

ViTi-->VfTf

4) Changes in both P and T, constant V

ViTi-->VfTf

Example Problem 1

(Please write out your complete solution and email to bes by next class period)

Consider a gas undergoing the following change under constant pressure (1.00 bar) conditions; calculate the change in entropy (ΔS): Vi = 10.0 L; Ti = 298 K; Tf = 398 K

Example Problem 2

(Please write out your complete solution and email to bes by next class period)

Consider a gas undergoing the following change under constant volume (10.0 L) conditions; calculate the change in entropy (ΔS): Pi = 1.00 bar; Ti = 298 K; Tf = 398 K

Wednesday, Nov 11, 2020

Thursday, Nov 12, 2020

Friday, Nov 13, 2020