Final answer:
Permits for compressed gases are required based on local safety regulations, type, and quantity of gas, with specific concerns about their storage and handling due to potential hazards.
Step-by-step explanation:
The correct answer is option Chemistry. Permits for compressed gases are generally regulated due to safety concerns about their storage and handling. The amount at which permits are required can vary based on local regulations, the type of gas, and its potential hazards.
For medical purposes, gases like oxygen and anesthesia gases are commonly used in hospitals and require careful monitoring. In industrial contexts, gases such as acetylene for welding or propane for heating are contained at high pressures for efficient use.
The safety of containers can be assessed using gas laws, including the ideal gas law and the van der Waals equation, to ensure they do not exceed their rupture pressure.
For example, a cylinder expected to contain chlorine gas at a certain temperature and volume must not reach pressures that exceed its design limits. Regulations might require permits based on the quantity of gas, the pressure at which it is stored, and its hazard potential.
The correct answer is option Chemistry. Permits are required for certain compressed gases depending on their properties and amount. Some common compressed gases that may require a permit include:
Oxygen, which is used in medical facilities
Acetylene, which is used in welding
Propane, which is used in barbeque grills
Chlorine, which is used in various industries
Gases like nitrogen, helium, and argon, which are used in scientific research and other applications
The amount of gas that requires a permit can vary depending on local regulations and safety considerations. It is important to check with the appropriate authorities to determine the specific requirements for each gas.