Answer :
Final answer:
Acetylene should not be used at pressures above 103 kPa due to the risk of explosive decomposition at higher pressures. This is to ensure safety when handling the gas.
Explanation:
The question is regarding the maximum safe operating pressures for acetylene gas. Acetylene is a highly flammable and potentially unstable gas especially when compressed. For safety reasons, acetylene should not be used at pressures above 103 kPa (15 psi) to prevent the risk of explosions or accidents. At higher pressures, acetylene can decompose explosively, especially in the presence of a catalyst or under the right combination of pressure and temperature.
As part of laboratory safety or industrial practice, guidelines such as those set by the Compressed Gas Association (CGA) and various safety boards must be observed when handling acetylene. The correct answer to the question, "Acetylene should not be used at pressures above," is a. 103 kPa.
