Are you saying that work cannot be done on a closed system?
I'm saying energy must exist to do work, so a closed system must contain energy to do work. If your closed system has no energy, no work will be done. If your closed system has energy then work can be done. It doesn't matter if the system is closed or open, what matters is you need energy to do work.
No. That is incorrect. I can start with an empty cylinder (i.e. closed system with Q=0)
and put gas into it. Compressing gas into an empty cylinder requires work (W).
E=Q+W
Once you put something into a CLOSED system it is no longer a CLOSED system!!!!!
You have no idea what you are saying!!!!!
I do know what am saying. Even what you posted in your post #128 agrees with me. See?
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The first law of thermodynamics relates changes in internal energy to heat added to a system and the work done by a system. The first law is simply a conservation of energy equation:
The internal energy has the symbol U. Q is positive if heat is added to the system, and negative if heat is removed; W is positive if work is done by the system, and
negative if work is done on the system.
The first law of thermodynamics
Closed system: The system of fixed mass across the boundary of which no mass transfer can take place is called as closed system. However, across the closed system the energy transfer may take place. An example is fluid being compressed by the piston in cylinder. (someone had to put the fluid in the cylinder, lol)
Types of Thermodynamic Systems and Important Terms Related to Thermodynamics – Part 1
A closed soda bottle is an example of a closed system. (Someone had to put the soda in the bottle, lol)
Thermodynamic systems
Work can be done
on a closed system. That's how God did it.
Like I said, space/time and energy/matter had a beginning. It is the only way to not violate the First and Second Laws of Thermodynamics.