What are the ignition point and the maximum flame temperature values given for propane?

What are the ignition point and the maximum flame temperature values given for propane?

• A. Ignition point 920; max flame temperature 3595
• B. Ignition point 500; max flame 1000
• C. Ignition point 1200; max flame 2500
• D. Ignition point 350; max flame 1000

Answer: (A)

Understanding propane’s ignition temperature and its flame temperature helps you gauge hazards and flame behavior. The ignition point here refers to the autoignition temperature—the temperature at which propane will ignite on its own without an external flame or spark. For propane, that value is about 920°F (roughly 490°C). The maximum flame temperature is the highest temperature a propane–air flame can reach under typical conditions, which occurs at a stoichiometric mixture; that value is about 3595°F (around 1980°C). So the option with an ignition point near 920°F and a maximum flame temperature near 3595°F aligns with these well-known propane properties, making it the best choice. The other options give temperatures that don’t match propane’s autoignition range or its extreme flame temperature.

Understanding propane’s ignition temperature and its flame temperature helps you gauge hazards and flame behavior. The ignition point here refers to the autoignition temperature—the temperature at which propane will ignite on its own without an external flame or spark. For propane, that value is about 920°F (roughly 490°C). The maximum flame temperature is the highest temperature a propane–air flame can reach under typical conditions, which occurs at a stoichiometric mixture; that value is about 3595°F (around 1980°C).

So the option with an ignition point near 920°F and a maximum flame temperature near 3595°F aligns with these well-known propane properties, making it the best choice. The other options give temperatures that don’t match propane’s autoignition range or its extreme flame temperature.