A chemical change that gives off heat. Burning paper would be an example.
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A fire is an example of chemical heat. The reaction of oxygen with combustible materials, simplest case, carbon say in coal, gives carbon dioxide and heat.
A catalyst affects the speed of a chemical reaction. If the chemical reaction gives off heat, the reaction may affect the temperature, but the catalyst by itself doesn't affect the temperature.
This the heat released during a chemical reaction.
Exothermic reaction gives free heat (energy).
exothermic reactions-gives off heat
Exothermic reaction gives free heat (energy).
Exothermic Reaction.
combustion
For example burning of gas.
A chemical reaction that gives off heat ... like burning a candle.
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A chemical change that gives off heat. Burning paper would be an example.
A fire is an example of chemical heat. The reaction of oxygen with combustible materials, simplest case, carbon say in coal, gives carbon dioxide and heat.
Exothermic (gives off heat - and light!).
An Endothermic reaction. If you touch the reaction vessel it will feel cool/cold, as it is taking in heat energy. By contract an Exothermic reaction is one that gives out heat. If you touch the reaction vessel it will feel warm/hot as it is liberating heat energy.