When LPG comes out of the cylinder and burns, it undergoes combustion with oxygen in the air. This reaction releases heat energy, causing LPG molecules to break down into carbon dioxide and water vapor. The physical changes include the release of heat, light, and the formation of gases like carbon dioxide and water vapor.
When LPG comes out of the cylinder, it changes from a liquid to a gas which is a physical change. When it burns, it undergoes a chemical change where it reacts with oxygen to produce heat, light, carbon dioxide, and water vapor.
When LPG gas burns on a gas stove, it undergoes a chemical change as it reacts with oxygen to produce heat, light, carbon dioxide, and water vapor. This is a combustion reaction. The physical change involved is the change in state of the gas from a liquid to a gaseous form as it is released from the cylinder and then burns.
There are multiple physical changes and chemical changes that occur when a candle burns. One physical change is that the candle melts back into liquid wax. One chemical change is flame burning on the wick.
Change-a (LPG changing from liquid to gas) is a physical change. It does not involve any chemical reactions, as the molecules of LPG remain the same as it transitions between its liquid and gas states.
water into ice water into steam both above are the physical changes physical changes means reversable change which can be brought into its original state eg:steam can be converted into water by cooling and ice into water upopn heating............ its true try it............
When LPG comes out of the cylinder, it changes from a liquid to a gas which is a physical change. When it burns, it undergoes a chemical change where it reacts with oxygen to produce heat, light, carbon dioxide, and water vapor.
Some wax burns, and as it does so, chemical changes occurs. Wax converts to CO2, CO, and H2O. That is an exothermic reaction The rest of the wax melts with the increased temperature. That is the physical change.
A physical and Chemical change.
When LPG gas burns on a gas stove, it undergoes a chemical change as it reacts with oxygen to produce heat, light, carbon dioxide, and water vapor. This is a combustion reaction. The physical change involved is the change in state of the gas from a liquid to a gaseous form as it is released from the cylinder and then burns.
There are multiple physical changes and chemical changes that occur when a candle burns. One physical change is that the candle melts back into liquid wax. One chemical change is flame burning on the wick.
When a match burns, the heat causes the matchstick to undergo a chemical reaction with oxygen in the air, releasing energy in the form of heat and light. This is a chemical change because the composition of the matchstick changes as it reacts with oxygen to produce new substances like carbon dioxide, water vapor, and ash.
The physical changes in the candle is that the wax melts, then freezes back into solid state again, and the chemical changes are that the wick burns, soot, and smoke. water vapor and carbon dioxide are formed. and When the wax burns, and the wax combines with the oxygen to form CO2, carbon monoxide, carbon particles (incomplete burning/oxidation) and water. After it burns, you can't get the wax back.
chemical change occurs first. because first oxygen help in burning and form carbon-di-oxide which is a chemical change
Change-a (LPG changing from liquid to gas) is a physical change. It does not involve any chemical reactions, as the molecules of LPG remain the same as it transitions between its liquid and gas states.
it is a chemical change because it causing the fuel to burn
Melting is the physical change.
Something that burns or is flammable would be a chemical change.