The heat conductivity of a substance does not involve changes to its chemistry. Heat conductivity is a physical change and characteristic to a substance.
Heat conductivity is a physical property.
I would think it to be a Physical Change. Not chemical.
i think it would be physical because it is still energy.
Classify it as chemical, the heat is used mainly to speed up the reaction.
An atomic bomb uses fission-- the splitting of atoms. It is purely a physical change, at first. Any gases produced in the air surrounding the explosion (which occurs before it touches the ground), along with the intense heat produced, causes chemical changes in the air.
It is a physical change because the reaction can easily be reversed and no heat is involved.
Thermal conductivity is a physical property.
Thermal conductivity Electrical conductivity
yes
Chemical
It is a physical change because the chemical composition of the substance does not change.
Its a chemical change hottie
Physical
This is a physical change, not a chemical change! It is because all the wax is still all there as for if it was a chemical change it would be all gone!Physical. Its physical state changed from solid to liquid. It's chemical make up remains the same.Melting wax is a chemical change because a new substance is forming. Trust me im intelligent and we just learned this in science.physical change :)It is a chemical change because it gives off heat even when it is burning. heat is one of the signs that tell whether it is physical or chemical change. The signs are heat , light's ,gas,discolor.Melting was would be a physical change-- no chemical reaction occurs when something melts or boils. A burning candle is a chemical change, both can occur at the same time.
I would think it to be a Physical Change. Not chemical.
The sidewalk being warmed by the heat of the sun is a physical change not a chemical change.
Neither. Body heat is a result of chemical changes, but it's not itself a chemical change.
Chemical, there is an interaction between the different chemicals in the heat pack.