The discussion revolves around the relationship between heat transfer (dQ), work done (dW), and changes in energy (dE) in quasi-static processes. Participants explore whether dQ can be zero in such processes and the implications of different types of quasi-static processes, such as isothermal processes.
Participants do not reach consensus on whether dQ can be zero in quasi-static processes, with multiple competing views presented regarding the applicability of the equations and definitions involved.
There are unresolved assumptions regarding the definitions of quasi-static and isothermal processes, as well as the conditions under which dQ may equal zero. The discussion highlights the need for clarity on the thermodynamic states involved.
Who says that this is the case for a quasi-static process? What about an isothermal quasi-static process, where dQ is not equal to zero?manhattan_project said:We know that dQ = dE + dW for any system.
However, in quasi-static processes, dW = -dE.
I don’t have a copy of that book. But, it dorsn’t sound correct to say that a system remains in a particular thermodynamic state if its internal energy changes. The equation you have written is correct only for an adiabatic change.manhattan_project said:I guess I am confused when dQ = 0.
In Reif's Fundamentals of Statistical and Thermal Physics, in Section 2.9 on quasi-static processes, it states that the work dW done by the system when it remains in a particular state r is defined as dWr = -dEr. I understood this as saying that dW = -dE for quasi-static processes