Difference between revisions of "PChem312 f20 w3"
Jump to navigation
Jump to search
| Line 15: | Line 15: | ||
How does one measure ΔU? | How does one measure ΔU? | ||
| − | :- changes in the system variables (ΔP, ΔV, ΔT, Δn) are an indication of ΔU; changes in system variables result in either heat (q) transfer or work (w) being done on or by the system. | + | :- changes in the system variables (ΔP, ΔV, ΔT, Δn) are an indication of ΔU; changes in system variables result in either heat (q) transfer or work (w) being done on or by the system; calculation of q or w leads directly to ΔU. |
:::ΔP, ΔV, ΔT, Δn --> q (heat), w (work) --> ΔU | :::ΔP, ΔV, ΔT, Δn --> q (heat), w (work) --> ΔU | ||
Revision as of 13:47, 31 August 2020
Monday, Aug 31, 2020
Continue reading chapter 2
Sec 2.1: Internal Energy and !st Law of Thermodynamics
U <-- internal energy (1st thermodynamic state function)
- Uf - Ui = ΔU, the change in the internal energy
- we cannot measure Uf or Ui, only ΔU.
First Law of Thermodynamics: the change in the system's internal energy is equal to, but opposite in sign, to the change in the surround's internal energy.
- ΔUsys = - ΔUsurr
How does one measure ΔU?
- - changes in the system variables (ΔP, ΔV, ΔT, Δn) are an indication of ΔU; changes in system variables result in either heat (q) transfer or work (w) being done on or by the system; calculation of q or w leads directly to ΔU.
- ΔP, ΔV, ΔT, Δn --> q (heat), w (work) --> ΔU
Sec 2.2: Heat
Sec 2.2: Work
Wednesday, Sept 2, 2020
Thursday, Sept 3, 2020
Meet in CSB 378