A chemical reaction occurs when the conditions for a chemical reaction exist.
Which is a really lame answer, so let's play with it. You want to make some water and carbon dioxide. You have some hexane, which is C6H14. If you set the hexane on fire, it will react with the oxygen in the air to produce carbon dioxide and water.
Since argon is a noble gas, I wouldn't expect much to happen; specifically, I wouldn't expect any chemical reaction.
Exothermic (hyperthermic) reaction: a chemical reaction that releases energy,*Endothermic (hypothermic) reaction: a chemical reaction that absorbs energy.** Energy = heat, light, etc.The direction of Heat transfer:Exothermic reactions transfer heat energy to the environment.Endothermic reactions transfer heat energy from the environment .
Burning is an oxydation reaction so a chemical change.
A substance which helps with chemical reactions, by making them possible at all, or reducing the effort required, is a catalyst.
A catalyst. It does do by decreasing the energy required for the reaction to take place (activation energy).
chemical reaction takes place in rancidity
a chemical reaction..
It refers to the energy changes that take place during a chemical reaction.
Yes. A reaction does take place in neutralisation.
no
in the middle
every were in the cell
no
Endothermic
This is an endothermic reaction.
They are not essential to cause a chemical reaction.
Yes. Corrosion is a chemical reaction