Which gas has a flame speed of 11 inches per second?

Natural gas is known for having a flame speed of approximately 11 inches per second. This rate is indicative of how quickly the combustion reaction propagates through the gas. The flame speed is a critical parameter in the context of gas safety and appliance operation, as it influences the design and functioning of gas-burning appliances and systems.

Natural gas is primarily composed of methane (CH4), which burns with a relatively steady and controlled combustion process. This characteristic flame speed is ideal for many residential applications, including heating and cooking, as it allows for efficient combustion without excessive risk of flashbacks or uncontrolled fiery behavior.

In contrast, other gases listed have different flame speeds that may be faster or slower than natural gas. This variance is essential for safety measures, appliance design, and operational protocols in different applications, making the understanding of flame speeds very critical in the field of gas technology and safety.