The steel wool weighs more after it is burned.
Since oxygen atoms have mass and are joined to the iron atoms, the resultant compound weighs more. If you were able to do this activity under perfect conditions, your clump of steel wool would weigh 30% more than its original mass.
Why does mass decrease when burned?
When things burn, it looks like they are destroyed, but during any chemical reaction no particles are created or destroyed. The atoms in fuels are simply rearranged from the reactants to the products during combustion.
Why do things lose mass when burned?
If you just capture the smoke you loose some weight. A significant fraction of initial mass goes into carbon dioxide and other oxidation products. Water vapor too. If you capture all the gases you end up with more mass due to added oxygen.
Why does steel wool burn with a battery?
When the strands of steel wool touch both terminals of the battery, they will complete the circuit and cause electricity to flow. This will heat up the steel wool, which will cause it to react with the oxygen in the air, or in other words, BURN!
How does steel wool gain mass?
When iron wool combusts, it reacts with oxygen from the air to form iron oxide. Iron oxide is a solid, so the oxygen atoms from the air add to the mass on the balance. The balance tips as the iron wool reacts with the oxygen to form solid iron oxide.
Does mass change when burned?
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.
Why does steel wool burn relatively easily and why will you not be able to to combust a thick rod of steel like this using a match to get the reaction started )?
But why does steel wool burn? Iron is actually a flammable substance. Steel wool, which is primarily iron, has a very high surface area that exposes it to oxygen. Combine that with the thin fibers that quickly transmit heat and you can maintain combustion.
Why do matches become lighter when burned?
The heat from friction also spurs the oxidizing agent in the match head to produce oxygen gas, which ignites the white phosphorus which in turn ignites the sulfur in the match head.
Is burning steel wool a chemical or physical change?
Burning Steel Wool is a Chemical Reaction
But the strands of steel wool are thin enough with enough surface area that heat produced is self-sustaining and will continue to burn through if there is enough air present.
How and why does matter change when it burns?
A chemical change, such as burning, is the result of a chemical reaction and will change the structure of the substance. The second is a physical change, such as folding or breaking, this is the result of a physical activity in which the substance atomic structure does not undergo a change but its physical shape will.
Does mass increase when heated?
As the energy within a an object increases – ie by heating it up – it will increase in mass.
