What is Enthalpy? // Thermodynamics - Class 53

The meaning of Enthalpy

Remember that this set of values (internal energy) and (PV value) are pretty common in many processes, specially in open systems!

Take it similar as Internal Energy guys!

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[florentinosanchez]

The best explanations in the whole youtube, I can thank you enough

[Myteries]

Enthalpy of a system is the amount of energy in a system necessary to do mechanical work. Example, fuel put in a car is not just used to drive that car, the enthalpy of that car is the amount of fuel used to drive the car. Some is used to heat the car, some lost to its surrounding.

[kimiwang]

thank you for this excellent explanation of enthalpy

[Rajbirsingh-efmb]

Please 🥺 explain what he said about open system at 0:52

[Jocularious]

Thanks man, that was clear, and straight to the point, cheers for helping a brother out :)

[ishaaqahamed]

Can someone plz help me through this dilemma?

Work is defined as the (W = F * s) when a body moves a straight distance under a constant force.

However, since for a curved path of varying force, we break down the curve to infinitesimal segments where the Force is locally constant and the distance (ds) is essentially straight. Thus,
for this tiny line segment, we apply the Work concept and we have dW = Fds. Summing up all the dW would give us the total Work.

This is why dW = Fds (and never dW = Fds + sdF).

I have the following problems:

Under what circumstances is Enthalpy explicitly defined for a system?
How can we say that dH = du + PdV + VdP when we never say dW = Fds + sdF?

[alphajohnalbert]

Im at the first grade of Engineering, why does Cu had more capability to reduce than Ag during electrolysis?

[giannitgonzales]

I want to freaking die I'm in the middle of staying for a midterm which I know ill fail and watching this made me cry bc I dont get it

[ankitgaidhane]

if the process is non flow, so PV will be equal to 0 or not, and change in enthalpy will be equal to internal energy?

[ran]

thanks, so good!
may I ask a question, Do you like Chemistry?

[piyushrawat]

sir if enthalpy is a state function, then why it is difficult to calculate absolute enthalpy?

[shah-jahan]

Why can't calculate absolute value of enthalpy.

[sumisumi.parvin.]

sir I am searching for your video on topic thermodynamics

[briankasmara]

Terrible audio quality. Extremely loud opening, then super quiet explanation, and then back to stupidly loud outro. Sort out your volume quality please, very unpleasant for headphone wearers.