0
Petrol or gasoline is basically octane - C8H18 and when it burns in air (oxygen) it converts to Carbon Dioxide and water and heat. It is thus a chemical change.
Each carbon atom in the fuel has approximately two hydrogen atoms attached to it, and so its reduced molecular weight is a multiple about 14. In the combustion process each carbon atom is combined with two oxygen atoms of atomic weight 16, to produce CO2 with a molecular weight of 44. In addition, the two atoms of hydrogen are united with one further oxygen atom to produce water with a molecular weight of 18.
So (approximately) 14 kg of fuel reacts with 48 kg of oxygen to produce 44 kg of carbon dioxide and 18 kg of water.
Elian Konopelski
Add your answer:
Earn +20 pts
Is the burning of phosphorus physical or chemical change?
Burning of anything is a chemical change. Combustion (burning) is a chemical reaction; it is simply where oxygen is added to, for example, an element, and turns it into an oxide. Burning phosphorus would result in phosphorus oxide. P + O2 --> P4010
Is dissolving zinc in water physical or chemical?
Zinc doesn't dissolve in water, but if it did, it would be a physical change.
Is a glass of juice frozen melted and refrozen a chemical or physical change?
physical :D I hope that helps
Is heating sulfur a physical or chemical change?
Heating sulfur is a physical change. You're not changing the chemical composition of the sulfur, just the temperature. Now if you heat it to its boiling point and and it changes to a vapor it's a chemical change because you've changed its state of matter.(Actually changing the state of matter of an object is still a physical change, as it does not change the chemical composition of the element)
Is boiling nitrogen in a laboratory a physical or chemical change?
Compression of nitrogen or any gas does not alter the chemical property...only changes involve in physical properties... On compression the gas molecules are come into more close..so it is pressurized..not change its chemical property...and whenever chances is come it s expand ..
Is chopping firewood a chemical change?
No, it is a physical change. Burning the firewood would be a chemical change.
Is tear a physical or chemical change?
A physical change. A chemical change would be, for example, burning clothes, or dissolving clothes.
Is flammability of a substance is physical or chemical change?
Stating that something is flammable is stating a chemical property. But the actual burning would be a chemical change.
What are examples of chemical and physical change?
melting any metal is physical. rusting iron is chemical
Is the burning of fuel in a car a chemical or physical change?
It would be a chemical change because it is burning. Like a newspaper on fire.
Is burning toast a physical change?
Burning toast would be a chemical change. The bread would be changed into carbon and the reaction can not be reversed.
How does chemical change happens in photosynthesis?
it happens when •A physical change is reversible, a chemical change is not.•the freezing of water would be a physical change because it can be reversed, whereas the burning of wood is a chemical change - you can't.
Is burning a tortilla chemical or physical change?
Chemical; you are changing the physical properties of the tortilla. Physical would be just warming or cooling it for example
Is Burning wood is an example of physical change.?
I think you mean "Is burning a paper a physical change?" Burning a paper is not a physical change. It is a chemical change. Because you can't turn the ashes of the paper into a normal paper again. Examples of physical change: Cutting a paper, sharpening a pencil, writing on a paper... Examples of chemical change: Rotten egg, Rusted steel, molded bread...
Is burning of leaves physical change or chemical change?
Burning leaves would be a chemical change because once the leaves are burnt, you can't turn the ashes back into leaves.
Is cutting a rope a physical change?
Cutting a rope is a physical change. Burning a rope, or disolving it in acid, would be a chemical change.
Is tearing cloth a physical or chemical change?
It is PHYSICAL CHANGE because it does not change into another substance and it does not have chemical reaction, it can be sewn back to return to its original form.
