ENTHALPY and INTERNAL ENERGY in 12 Minutes!

Enthalpy ~ Heat added or removed at constant pressure
Internal Energy ~ Heat added or removed at constant volume
Quality and Saturated Liquid & Saturated Vapor values for u and h.

0:00 Constant Volume vs. Constant Pressure
0:33 Heating at a Constant Volume
1:12 T-v Diagram at Constant Pressure
1:26 T-v Diagram at Constant Volume
2:10 First Law for Constant Volume
2:37 Q and Internal Energy Discussion
3:31 Change in Internal Energy
4:15 First Law for Constant Pressure
5:26 Enthalpy
5:57 Property Tables for u and h
6:21 Saturated Liquid & Saturated Vapor
6:50 Quality for u and h
7:16 Example for a Constant Volume Process
7:54 Solution

Previous Lecture:

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Other Thermodynamics Lectures:

19. Transient Systems:
28. Otto Cycle:
29. Standard Diesel Cycle:
30. Rankine Cycle:
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Other Engineering Courses (Playlists):

[ayushchoubey]

Sir, I have never on the Internet found lectures so precise and concise, you are truly amazing, * hats off *

[robertbengel]

You are a wizard with this note-taking software

[vladimircastanon]

I simply CANNOT put into words how incredible this video was. What an amazing explanation and example with simple to follow problem solving method. You truly have a gift for teaching, and I do hope you keep making more videos. Hats off to you sir, thank you.

[lucasfc]

What???? It was so easy to follow im totally impressed, now I think I may understand enthalpy

[altanata]

absolutely crazy how good you are at this

[MaxxYurri]

You are the reason I'm not going to fail this class. I have a professor that mumbles so bad that no one in the first row can understand him with chicken scratch hand writing

[foxhound]

I love your videos, Question: If I was to take a fluid element a sea level, and raise it up to a higher altitude (which is at a lower pressure) the fluid element would expand, pushing back the atmosphere. The work done pushing back the atmosphere would cause the internal energy of the fluid element to decrease. The transferred energy, out of the fluid element, would be in the rest of the atmosphere. Of course, the atmosphere is an infinite reservoir, so you would not be able to see any temperature increase. However, what about flow thru a closed duct system, with a compressor? The "work" done by the compressor on a fluid element would appear as an increase in internal energy, an increase in kinetic energy (which we will assume is negligible) and some of the work will go into the fluid element "pushing" into the system. Where does the energy from the "pushing" go? The duct system is not an infinite reservoir like the atmosphere, does that energy appear spread out in the system as an increase in internal or kinetic energy?

[gooddeedsleadto]

Why is in a steam drum not a constant volume process, it is heated with burners the pressure should also go up. How it is heated at constant pressure in a steam drum under constant volume?
Thank u

[gooddeedsleadto]

Line ( dome line) represents saturated liquid or saturated vapor?
and
everything within the dome is also saturated liquid or saturated vapor?
And
Left & right of the dome is sub cooled liquid and super heated vapor respectively?

Please verify?
Thank u

[alexanderlee]

So you aren't changing the potential energy by compressing water vapor inside a rigid tank?