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When something burns, it is getting oxidized. Combustion reactions involve oxygen.
During oxidation,
1.the substance forms a bond with oxygen (or)
2.an element of the substance breaks away from it to bond with oxygen.
The mass of the reactants (substance + oxygen) are always equal to the mass of the products.
If the mass referred to in the question is the mass of the substance, then you can say that the mass has increased due to the addition of oxygen when the substance is forming a bond with it.
However in reactions where an element breaks off the substance to bond with oxygen, the mass in question can be assumed to be that of the major portion of the substance. Then, it may be said that the mass of the substance has reduced. For example, carbon in a substance combines with oxygen to form CO2. Thus the substance loses carbon and its mass reduces.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThe burned wood will have less mass than the original wood. Part of that is the result of the chemical reaction that occurs when the wood burns, but also because a noticeable percentage of the ash will more than likely be carried away by the heat.
Wiki User
∙ 12y agothere is no change in mass because according to antoine l lavoisiers theory mass of reactants is equal to the mass of products and if we do combustion without letting the gas escape so the mass will be same.
Wiki User
∙ 11y agoIt decreases because some of it is released as carbon dioxide and water vapour.
Wiki User
∙ 11y agoYes, seeing as some of the log is being burned away.
Wiki User
∙ 6y agoBurning is a chemical reaction, new substances are obtained, each with a different mass; only the toatal mass of reactants and products is equal.
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Does your mass change if you were to travel to the moon?
Your mass will not change, but your weight will.
Does the mass of something change if you change it shape?
No. Mass is independent of shape. The mass, as measured by weight, will be the same. If the material is compressible and you change the volume as a result of changing the shape, the density will change although the mass will not.
Does your mass change as you travel to the moon?
No. Your mass stays the same no matter where you are.Your weight however, will change because of the lack of gravity.---The mass won't change as mass is what you are made up of the 'stuff' your are made up of.Only the gravity will change.
How is the mass of the rocket change when it lits of?
The mass of the rocket does not change, no matter what it is doing. The mass of the fuel inside the rocket will decrease as it is used up.
When an astronaut is propelled into space does his mass increase or decrease?
The mass of an astronaut in space does not change, except for the minor changes that occur due to change in exercise and eating. Mass is mass, and represents the amount of material in an object. His weight, however, does change, because weight is mass times the acceleration due to gravity, and gravity does indeed change.
What observations did Antoine Lavoisier make?
He noticed that there was no change in the total mass of material within the container during combustion.
Is the combustion of wood an example of a physical change?
Combustion (burning) is a chemical change.
Is combustion a chemcial change?
Combustion clearly is a chemical change. In the combustion of a hydrocarbon, for example, you begin with the hydrocarbon and after combustion you end up with carbon dioxide (CO2) and water (H2O). This demonstrates that a chemical change has taken place.
One gallon of isooctane has a mass of 2.6 kg What is the change in enthalpy for the combustion of one gallon of this compound?
f**k i need this answer too
The combustion of coal is a change?
The combustion of coal is a chemical change - an exothermic reaction between carbon and oxygen.
what is the mass in grams of oxygen, is needed to complete combustion of 6 L of methane?
what is the mass in grams of oxygen, is needed to complete combustion of 6 L of methane?
Is combustion of gasoline a physical change?
Combustion of gasoline changes the chemical properties of the matter, and is thus a chemical change, not a physical one.
Is combustion a physical change?
NO its a chemical change for it can't be reversed
Is fireworks a physical change?
No. Fireworks are an example of a chemical change called combustion.
How can we reduce the combustion of fossil fuels?
You can change the air-to-fuel ratio to get less optimal combustion.
Why the hp of an engine change in the same engine?
Amount of fuel and amont of air, and the compressability of the combustion chamber. Of course it is all relative to the amout of Rotating mass that the motor is attched to.
Is combustion a physical change or a chemical change?
Combustion is basically a chemical reacting with oxygen to become the oxide and water is produced. So when alcohol combusts, for example, it is changed (burned) to carbon dioxide and water. In other words, there is a chemical change.
