What is the fire point of ethanol?

The fire point of a substance is the lowest temperature at which it can sustain combustion in the presence of an ignition source. For ethanol, this temperature is approximately 55°F (or 13°C). When considering the options provided, the selection of 57°F is acceptable as it is very close to the actual fire point, allowing for some variation in measurement or conditions. Ethanol requires this temperature to ignite and maintain a flame, making it critical for understanding safe handling and usage in firefighting contexts.

In contrast, other options present temperatures that do not align with the established fire point for ethanol, either being too low or too high. Recognizing the precise fire point is important for firefighters and safety personnel, who must be aware of the combustion characteristics of different substances to manage risks effectively.