Why does boiling oil catch fire?
In contact with the boiling oil, therefore, the water passes directly from the liquid state to the gaseous state. This behavior of the water causes a sort of explosion, through which the oil is pushed with considerable violence upwards, reaching points even several meters away from the trigger point.
Why does the oil catch fire?
The oil catches fire because like any combustible material at a certain temperature they can be ignited in the presence of an ignition (spark, flame, friction, heat, ...) and at a higher temperature they can ignite without there being a real ignition external.
What to do if the oil catches fire?
Place the lid on the pot using an oven mitt. This is the easiest way to smother a fire caused by cooking oil. With the lid on (and the flame of the stove off), the fire quickly consumes all the oxygen and goes out spontaneously.
How to smother a flame?
How to proceed then? With the help of tweezers or the tip of the scissors, immerse the wick in the liquid wax that has formed in the cup of the candle; the flame will go out immediately. At this point, bring the wick back to a vertical position.
Who boils water or oil first?
The water starts boiling at 100 degrees and the appearance of bubbles makes this process quite evident. When frying, however, the fat or oil must be heated between 140 and 190 degrees, depending on their smoke point.
EXPLOSIVE OIL IN CONTACT WITH WATER
Find 19 related questions
How do you understand the boiling point of a compound?
In fact, at a temperature of 100 ° C (and a pressure of 1 atm), there is an average kinetic energy of the particles of the liquid such that the vapor pressure of the liquid reaches the value of the external pressure and the liquid begins to boil.
Why doesn't the oil boil?
The answer is to be found in a very simple physical principle: the boiling point of oil and water, in fact, differs by about 200 ° C. If the water boils at 100 ° C, the oil needs a whopping 300 ° C to reach the boiling point.
How to put out a fire of flammable liquids?
HOW TO PUT OUT A FIRE CAUSED BY FLAMMABLE OIL / LIQUIDS- 1) Shut off the fuel supply.
- 2) Use a fire blanket to smother the fire.
- 3) Use a class B fire extinguisher.
How to put out fire on a person?
- The victim has to stop. ...
- The person exposed to the flames must throw himself on the ground, rolling left and right, protecting his face and avoiding breathing fumes.
- If possible, a nearby person can use a fire blanket to suffocate the combustion first (this isolates the fire from the comburent);
When can't water be used as an extinguishing liquid?
Water as a good electrical conductor must not be used to extinguish fires of live electrical equipment, it is contraindicated in fires from metals and particularly reactive powders because it could give rise to dangerous reactions.
What puts out a fire?
Use a class A fire extinguisher.
To use the fire extinguisher, aim it at the base of the flames and direct the spray back and forth across the fire until it goes out. If you can't put out the fire with the fire extinguisher within five seconds, then the fire is too big.
How to use fire blanket?
How to use the fire blanket
To remove the blanket from the container, just pull the tab and then you just have to place the blanket over the beginning of the fire, taking care to cover it as much as possible.
Why does salt put out the fire?
3. Baking soda or salt. ... Baking soda is more suitable for smaller flames as, when heated, it releases carbon dioxide which takes oxygen away from the fire.
What do firefighters use to put out the fire?
The vehicle most used for interventions is the APS (tank pump car). ... For interventions at sea, special boats equipped with pumps are used to extinguish fires on ships.
How is the Greek fire extinguished?
In the medieval treatise Liber Ignium ad Comburendos Hostes, written in Latin credited to Marcus Graecus, it is stated that the only way to put out the Greek fire would have been to use urine, sand or vinegar.
What are the three elements that form the fire triangle?
For combustion to take place, three elements must be present: the fuel, the comburent and the ignition source. Let's see in detail what it is. Fuel is any substance, organic or inorganic, capable of igniting. In our case then the gas.
How is a class C fire extinguished?
The most suitable extinguishers are foam, powder and Co2. The best extinguishing agent is foam, since it acts by suffocation; on the other hand, the use of full jet water is not recommended.
How is an electrical fire extinguished?
If a fire breaks out caused by a problem with the electrical panel, try to put it out using a class C fire extinguisher that contains carbon dioxide (CO2) to spray on the flames in order to put them out.
What is the best extinguishing agent that can be used for a flammable liquid fire?
Carbon dioxide is an “excellent extinguishing agent for class 'B' and 'C' fires (liquid and gas fires) and for fires from live electrical equipment”.
How can you prevent frying oil from frying?
Drying food before soaking it in oil is a great way. To remove the foam, take a skimmer and remove it. Wait for the temperature to rise, and dip the pieces of food a little at a time.
How to adjust the frying oil temperature?
So the ideal is to fry a few foods at a time in a lot of oil. The oil, unlike water which stops at 100 °, continues to go up in temperature, therefore when it exceeds 185 ° it is necessary to turn it off under the pan, turning it back on when the temperature drops too much.
How to avoid frothing when frying struffoli?
Rub the struffoli lightly on the surface to round them and avoid adding flour. Remove all excess flour with a sieve (step that will allow you not to foam during cooking). Fry in hot oil until golden brown.
How to understand the boiling point?
In a sense, boiling is the evaporation of the whole mass of liquid. For example, if we consider water at atmospheric pressure and at 100 ° C, we can observe bubbles that move from the bottom up: they are vapor bubbles formed due to the evaporation of molecules in the mass of the liquid.
How to understand which molecule has the highest boiling point?
Yes, H2S has the lowest boiling temperature, but if it only depended on the molar mass of the compound it would have to be H2O. On the other hand, H2O at normal atmospheric pressure has the highest boiling temperature of all.
How does the boiling temperature vary as the atmospheric pressure varies?
The water can therefore boil at innumerable temperatures because the values that the external pressure can assume are innumerable. Therefore: by increasing the external pressure the boiling temperature of the water increases. by decreasing the external pressure the boiling temperature of the water decreases.
