thermodynamics - What is constant in an isobaric process, internal ...
2022年6月21日 · Only if it is a reversible isobaric process, it is both the external and gas pressure. That's because for a reversible isobaric process the pressure of the gas is always in equilibrium with the external pressure. For the process to be reversible, it has to be carried out very slowly (quasi-statically).
Work done in Isobaric Process - Physics Stack Exchange
2018年7月5日 · But isobaric process is an exception. Isobaric Process($\Delta P=0$):-Here, when heat is given to the gas, that heat partly increases it's internal energy and some is used as work by gas for the expansion. Due to the increase in internal energy, there is increase in the temperature of the gas. Here's a similar question which tells the same ...
How does entropy stay constant for an isobaric process?
2021年12月3日 · What I don't understand (Isobaric process): Suppose, I have a cylinder filled with a monoatomic ideal gas with a frictionless piston. Now, if I add heat to the system very slowly, so that the macrostates are defined the whole time, and allow the piston to move freely, the gas will expand at constant pressure.
thermodynamics - Can a process be adiabatic and isobaric? Or ...
2020年4月10日 · Adiabatic process in itself does not require constancy of any thermodynamic variable, and so you can have a process which is adiabatic+isobaric, or adiabatic+isochoric, or adiabatic+isothermal. If the process is reversible, then adiabatic implies that entropy is constant, and then you cannot have any of the aforementioned processes. Hope this ...
Work in isobaric processes - Physics Stack Exchange
2022年3月23日 · Such a process is irreversible and therefore the pressure of the gas is undefined. No work is done against a vacuum. However, on Wikipedia, it states that p is the pressure of the gas and work can be represented by: W=-pdV=-nR*dT (isobaric case) Wikipedia is referring to a reversible isobaric process for an ideal gas.
thermodynamics - Is work a state function for an isobaric process ...
2020年12月21日 · In some specific cases, like in the isobaric process you mention, the amount of work done is path-independent, which means that we only need the initial and final states to calculate it. So we can say "for such processes, the work done is a …
thermodynamics - Work done "by gas" in a isobaric process?
2020年9月25日 · Now, for an isobaric process, it is given by. ΔW = ∫PdV = PΔV. here P is the external pressure, which remains constant. Here is my doubt. Why do we take P as external pressure while calculating work done by "gas". Taking P as external pressure will calculated work done by surrounding, not by the gas.
How pressure is kept constant during isobaric process?
2023年4月8日 · I understand that during an isobaric process, the container is in contact with a pressure reservoir, ensuring that the gas is in mechanical equilibrium with its surroundings for the whole process. This process happens quasistatically. I am uncertain how this …
Irreversible isobaric process paradox - Physics Stack Exchange
2017年8月25日 · $\begingroup$ I came across this when researching irreversible isobaric processes. While I agree with your answer, I wonder if the only irreversible isobaric process involves a sudden pressure drop. That example involves mechanical disequilibrium.
gas - How is an Isobaric process consistent with the first law of ...
2019年5月22日 · Suppose there is an isobaric process whereby the volume of a gas decreases while the pressure of the gas remains constant. Work is done on the gas to compress it. Since the change in internal energy = Q + W from the first law, there's a +W so the internal energy of the gas should increase.