The minimum temperature at which a liquid gives off sufficient vapors to form a mixture to sustain fire when an external source of ignition is brought to it is called

The minimum temperature at which a liquid gives off sufficient vapors to form a mixture to sustain fire when an external source of ignition is brought to it is called Correct Answer flash point

Explanation:

Flash Point: 

• The flashpoint of a volatile material is the lowest temperature at which vapors of the material will ignite when given an ignition source.
• The minimum temperature at which a liquid gives off sufficient vapors to form a mixture to sustain fire when an external source of ignition is brought to it.
• However, more highly volatile liquids such as gasoline, alcohol, naphtha, etc., have flashpoints so low they can be ignited readily at room temperature. 
• The fire hazards that these liquids present are due to the fact that even at low temperatures they are constantly giving off highly flammable vapors. 

Fire Point: 

• The fire point of a fuel is the lowest temperature at which the vapor of the fuel will continue to burn for at least 5 seconds after ignition by an open flame. The main difference between fire and flashpoint is that at the flashpoint a substance will ignite briefly, but vapor might not be produced at a rate to sustain the fire. 
• For every fuel, the flashpoint temperature appears before the fire point temperature.
• Flashpoint and fire points are related to high-temperature characteristics of the fuel and tell the behavior of fuel at high temperatures.

Spontaneous ignition

• A chemical reaction in which there is a slow generation of heat from oxidation of fuel and under certain conditions, heat generation is accelerated until the ignition temperature of the fuel is reached is called Spontaneous ignition.
• The chemical reactions generating heat spontaneously imply the risk of ignition and burning as “internal ignition sources”.