Final answer:
In removing oil from a low pressure system, the temperature should be raised above the boiling point of the refrigerant to allow for its evaporation from the oil, similar to principles used in HVAC systems and the handling of pressurized gases. Temperature control is essential in such processes for efficiency and safety.
Step-by-step explanation:
When removing oil from a low pressure system, especially in the context of refrigeration or HVAC systems, it's essential to achieve a temperature that allows for the maximum removal of refrigerant from the oil. Though the question does not state an exact temperature, a good practice involves heating the oil to a level just above the boiling point of the refrigerant it holds. This ensures that the refrigerant evaporates from the oil and can be safely reclaimed or captured.
Referencing similar principles of thermodynamics, like those applied in the extraction of 50 J per cycle from a freezer at a constant temperature, it is vital to follow temperature-related safety guidelines for handling refrigerants. Concerning the gas cylinder scenarios provided, temperature plays a critical role in managing pressure. For instance, if a gas cylinder is subjected to a decrease in temperature, as is done with the cylinder cooled to dry ice temperature, the internal pressure correspondingly drops.
Moreover, in the fractional distillation of crude oil, oil heated to about 425 °C enters the distillation tower and vaporizes, showcasing how temperature controls the phase and behavior of substances. In the practical use cases provided, these examples illustrate the need for precise temperature control which parallels the rigors of removing oil from a low pressure system. It's also evident that avoiding extreme temperatures, like storing canned pressurized gases below 120 °F, is crucial for safety and maintaining system integrity.