In UV-light oxygen is given off as follows:
2 KMnO4 --> K2MnO4 + MnO2+O2If you heat up potassium permangenate extremely, oxygen is given off according to:
4KMnO4 --> 2K2O + 4MnO2 + 3O2Production of O2 H2O2 (aq) ------------> 2H2O (l) + O2 (g) Hydrogen Peroxide Solution ---------------> Water + Oxygen gas ----
the products would be the metal oxide.
Ex: Na + O2 = NaO
For example a combustion reaction.
Many do. one is photosynthesis
I think trees...... akward.....
decomposition of H2O2
Photosynthesis in green plants.
When heated, wood gives off gasses. Those gasses combine with oxygen in the air, producing a chemical reaction that gives off heat. Rapid oxidation of a fuel is called combustion, or fire.
A chemical reaction that gives off heat ... like burning a candle.
Exothermic (gives off heat - and light!).
A reaction that gives off heat . A reaction that takes in heat is ENDOTHERMIC.
When a candle burns the reactions that occur are both chemical and physical. Chemical reaction is when substances are mixed together to create a different material. A physical reaction is when there is a change in the appearance of the substance. For example when water turns to ice, and when chocolate melts. The chemical reaction that happens when a candle burns is when the oxygen combines with the paraffin. When this happens, this makes carbon dioxide, water and other materials. When the wax reacts with the oxygen it gives off light and heat. The more oxygen that reacts with the candle when it burns, the brighter and hotter it is. The physical reaction that occurs is when the candle wax melts. When the energy (light and heat) inside of the candle is released it helps to melt the candle.
Exothermic Reaction.
exothermic reactions-gives off heat
When heated, wood gives off gasses. Those gasses combine with oxygen in the air, producing a chemical reaction that gives off heat. Rapid oxidation of a fuel is called combustion, or fire.
A Combustion Reaction.
An endothermic reaction is one that consumes heat.
Effervescent, I believe.
The presence of sunlight, carbon dioxide and chlorophyl gives up oxygen to air during the photosynthesis.
A chemical reaction that gives off heat ... like burning a candle.
Smell
The reaction of potassium with water is highly exothermic. That is, it gives off a lot of heat. Hydrogen, which is formed by the chemical reaction is ignited by this heat and so explodes.
Exothermic (gives off heat - and light!).
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.