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Why does burning a log in the fireplace involve a chemical reaction while sawing a log in half does not?
Burning a log in the fireplace involves a chemical reaction because it undergoes combustion, reacting with oxygen to produce heat, light, and new chemical compounds like carbon dioxide and water vapor. Sawing a log in half is a physical change where the log is simply being cut into smaller pieces without any chemical reactions occurring.
Is matter being lost when burning a log?
In a chemical reaction the mass of reactants is equal to the mass of products; burning is a chemical reaction.
4. A log is reacting with oxygen as it burns in a fireplace. If the amount of oxygen reaching the log is reduced what happens to the rate of this chemical reaction?
If the amount of oxygen reaching the log is reduced, the rate of the chemical reaction (combustion) will slow down. This is because oxygen is a reactant in the combustion process and reducing its availability will hinder the reaction from proceeding at the same rate.
If the amount of oxygen reaching the log is reduced what happens to the rate of this chemical reaction?
The rate of the chemical reaction will decrease because oxygen is one of the reactants required for the reaction to occur. With less oxygen available, the reaction will proceed at a slower pace.
What is the name given to the chemical reaction that result in fire?
Fire(Burning) is a chemical change. Once you burn a log, you won't get the log back, that's how it's a chemical change. Also, Fire needs Oxygen (O2) to burn and stay alive but with too much Carbon Dioxide (CO2) it will die out.
Is sawing a board in half is a chemical change or a physical change?
Physical
What forms of energy is used as a log burns in a fireplace?
Burning or rapid oxidation is a chemical reaction which releases heat.
How does one win a sawing contest?
Sawing contests usually consist of three stages: Chopping, hand sawing, and chainsawing. You start on the competition by chopping a log in half, any way you can, you then go to a manual saw, doing the same, then you go to the chainsaw. The person who finishes first wins.
Is burning a log a mixture?
Burning a log involves a chemical reaction where the wood undergoes combustion, producing heat, light, and ash. It is not considered a mixture as the log itself is a homogeneous material made up of cellulose, lignin, and other components that undergo a chemical change during burning.
What happens to the log when it burns in a fire?
When a log burns in a fire, it undergoes a chemical reaction called combustion. The heat from the fire causes the wood in the log to break down and release gases and smoke. The remaining solid material turns into ash.
What are the three methods of sawing logs into lumber?
The three methods of sawing logs into lumber are through circular sawing, band sawing, and frame sawing.
Methods for obtaining veneers from a log?
Veneers can be obtained from a log through several methods, the most common being slicing, peeling, and sawing. In the slicing method, the log is cut into thin sheets, often using a specialized veneer slicer. Peeling involves rotating the log against a sharp blade to create a continuous sheet of veneer, similar to peeling an apple. Sawing, on the other hand, uses a saw to cut the log into thin panels, which can result in more waste but allows for greater control over the thickness and grain pattern.
