# I got 98% in my thermo midterm!

I just cannot believe what I have just seen, 98% in my thermodynamics midterm exam. I hope to keep this up in my final exam!
Congratulations ❤️❤️❤️❤️
congratulations to you 👍
This is a song I wrote which led me to this success:

Energy Balance （Original：林家謙-下一位前度）（2019）
V1: Net Energy transfer Equals to all delta E
In piston, PdV, Area under process curve's W
Both PV's difference over 1 minus n, polytropic
P delta V, constant P
And PV log ratio of Vs isothermal

V2: Q minus W, delta U, cause no KE or PE here
P delta V is W b, Q minus that, W other, it's delta U
This Equals to delta H, m(h2 minus h1)
Since the pressure is constant, there is nothing wrong
It's used for constant pressure expansion contraction

C: Remember E in minus E out
Equals to delta E of system
Delta U plus boundary work is delta H
Enthalpy is U plus PV
It's just Q minus W other
Used in closed system under constant pressure

V3: Stationary zero KE PE change process
Insulated negligible heat transfer, E's zero, no work interactions
Then you form equation, it's just so straightforward
Then you can visualize it on PV diagram
Find quantity with pure substance properties or ideal gas law

(Repeat C)

B: Find your P V T all by the tables
Find x in final state, judge it and find T
Then u is just u f times x u fg
If ideal gas, make sure you have V and P
Then you have drawn your PV diagram
You just take area, or use the right process formula

(Repeat C)