i am a solid substance left after heating coal or petol
loke
coke
Coke
coke
By burning the solid it produces a liquid - this being the petrol.
Coal is not a mineral. A mineral is a solid non-organic substance. Coal is an organic substance.
yes yes it does.
John W. Bartok has written: 'Solid-fuel furnaces & boilers' -- subject(s): Boilers, Coal, Fuelwood, Furnaces 'Heating with coal' -- subject(s): Coal, Coal Stoves, Heating
Petrol is better fuel for cars than coal because coal is a solid therefore it has to be transported by lorries or trains, releasing carbon dioxide and other harmful emissions. Petrol however is a liquid and can be transported in tankers or sent through pipes. Furthermore, coal releases less energy than petrol.Additional answerIt would be fair to say that petrol is more efficient than coal in energy conversion terms. It's also less dirty (imagine your Mum filling up at a coal station!)
chemical. A chemical change is a change where a substance is changed and a new substance is formed. in the case of coal when the solid carbon in the coal combines with the oxygen in the air carbon dioxide (CO2) is formed.
cook the coal in a oven without air and distill the gas , its called cracking and you have crude petrol