Thermodynamics - 4-2 Moving Boundary Work in a constant pressure process

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[@nickoemmanuelvillacruz3090]

Arguably one of the best engineering youtube channels

[@abdullateef187]

You’re an amazing human being. Thanks dude

[@ilfi.]

Dr, u mixed between 200 degree and 250 degree, that when u were looking for v2 . So the final answer is wrong

[@abdullahemirtaskesen9666]

Thank u for your great effort to provide us such nice videos.
I wan t to ask that isnt the boundary work in this case negative because we said expansion means Wout so it should be negative am i wrong?

[@engineeringdeciphered]

The equations we derived for boundary work are all for “expansion” boundary work. So the equations will give us the value for boundary work out. Now, when we get ready to put that boundary into the conservation of energy equation- that’s when we need to make sure we plug in boundary work “out” as negative. But our boundary work equations are all positive for expansion (boundary work “out”).

[@yigitcan824]

I thought same thing mate, the system is doing work so it's Wout which is negative?

[@desirexiluvelosebise7725]

Hi. How do I calculate the initial and the final temperature while the constant pressure ?

[@huangbabarotmg]

legend, if i ever meet you in person I will drop everything im doing and make you fried rice on the spot

[@turk2589]

There is one digit error.

[@samibasha]

Super

[@emirbfitness]

goat

[@iDovahkiin]

Thanks for the tutorials.
Btw, You could've substituted PV for mRT right? Or did you not do it because you don't know if it is an ideal gas?

[@solounomas0]

I think so but I search it and it says saturated water vapor can be considered as an ideal gas. If so you could substitute by mR(T2-T1) but you should get R and T1 by the tables.