Final answer:
The question involves understanding how gases behave under changes in temperature and pressure, particularly with reference to safety protocols and repair scenarios.
Step-by-step explanation:
The student's question relates to the behavior of gases under changes in temperature, based on the principles of ideal gas law. The warnings on the gas canister relate to the risk of increased pressure that can lead to explosions when stored above certain temperatures or if incinerated.
Regarding the R-134a refrigerant, the SAE standard J2099 maximum level of non-condensable gases in recycled R-134a should not exceed a specific threshold, but the actual numeric value for this standard is not provided in the question or in the information provided.
For the case of a gas in a can initially at 24 °C and 360 kPa, we can use the Gay-Lussac's law to determine that the pressure increases when the temperature rises. If the temperature goes from 24 °C (297 K) to 50 °C (323 K), we can expect the pressure to increase proportionally because the volume remains constant. The same principle can be applied to the high-pressure gas cylinder example and the cylinder's resulting pressure after it is cooled to dry ice temperature.
For cooling a tank to reduce pressure, the final temperature can be found by applying the combined gas law considering the volume and amount of substance are kept constant. The practicality of cooling a tank as a solution depends on the efficiency and safety of the cooling process.