Discussion Overview
The discussion revolves around determining the original pressure of Freon 12 contained in a sealed glass container as it is cooled from 50°C to 20°C. The context includes thermodynamic principles and the interpretation of vapor pressures at different temperatures.
Discussion Character
- Homework-related
- Technical explanation
- Debate/contested
Main Points Raised
- One participant calculates the original pressure by subtracting pressures from the Freon 12 table at 50°C and 20°C, arriving at 652 kPa, but expresses uncertainty about the method.
- Another participant argues that at 50°C, the Freon is fully vaporized and suggests that the original pressure should be slightly above the vapor pressure at 20°C, which they state is 566 kPa.
- A later post questions the validity of the initial calculation and suggests that the first temperature could have been any value above 20°C, indicating that the approach may be flawed.
- Two participants inquire about the pressure of the gas at 50°C, assuming constant volume, but do not provide a definitive answer.
Areas of Agreement / Disagreement
Participants express differing views on the appropriate method to determine the original pressure, with no consensus reached on the correct approach or final answer.
Contextual Notes
There are unresolved assumptions regarding the behavior of Freon 12 at different temperatures and the implications of vapor pressure calculations. The discussion reflects varying interpretations of thermodynamic principles.
. I overlooked this second part of the problem. Hopefully the OP returns to also figure out how to work it.