The discussion revolves around a thermodynamics problem involving changes in pressure, enthalpy, and internal energy, specifically related to the behavior of ethane. Participants are examining the implications of given values such as density and the relationship expressed by the equation pV=c.
The discussion is active, with participants providing insights and questioning the assumptions related to the behavior of the gas. There is a focus on the potential inconsistency in the problem statement regarding ideal versus non-ideal gas behavior, and some guidance has been offered regarding the implications of the equations presented.
Participants note that the density provided refers to the initial state, and there is uncertainty about whether the problem statement is complete or if additional information is needed to resolve the inconsistencies being discussed.
Is there some sort of problem statement here?turtleGuy said:Pressure initial: 95 kPa
Final pressure: 190 kPa
Change in enthalpy: -2.96 kJ
Initial volume: 0.045 cu.meter
Density: 1.11 kg/cu.meter
pV=c
Chestermiller said:Is there some sort of problem statement here?
Chestermiller said:What are your thoughts on this?
pV being constant means that ##\Delta U=\Delta H##. But, if these both are not equal to zero, that means that the behavior is inconsistent with the behavior of an ideal gas. So either, the gas is behaving non-ideally or there is inconsistency in the problem statement. So I ask again, are you currently learning about the behavior of non-ideal gases, or are you only covering ideal gases now?turtleGuy said:yeah they only said pV=constant. The density is on the Initial.