CFC's or chlorofluorocarbons are fully halogenated paraffin hydrocarbons that contain only carbon, chlorine, and fluorine. They are made as a volatile derivative of methane, ethane, and propane, also known by the Dupont brand name Freon. CFC's are used in a variety of applications because of their low toxicity, reactivity, and flammability.
Every permutation of fluorine, chlorine, and hydrogen-based methane and ethane have been examined, and most have been commercialized. Uses include refrigerants, blowing agents, propellants in medicinal applications and degreasing solvents. Their decreased volatility is attributed to the molecular polarity induced by the halides, which induces intermolecular interactions.
The answer is B. When evacuating the system vacuum gauge, the vacuum gauge should be as close to the system being evacuated as possible. This will ensure that the reading of the gauge pressure is as accurate as possible before the evacuation of the system vacuum gauge from its currently location.
This is a very important step since having an incorrect reading of the gauge pressure can have negative effects if the gas pressure is too high. Make sure to double check this and other important steps when dealing with chlorofluorocarbon or any other type of gas.
The correct answer to this question is A, and There is no pressure relief valve on the standard hose and the liquid refrigerant trapped in the tube could build up significant pressure and rupture the tube. Refrigerants are fluids that are used in refrigeration cycles and heat pumps.
In these cycles, the fluid is usually turned from liquid to gas and then back again. Examples of these fluids that have been used include chlorofluorocarbons and fluorocarbons. Though the use of these types of liquids has decreased due to their environmental hazards, it is essential to transfer these liquids properly, so it doesn't cause harm to the machine.