The chemical equation is:
Cu2CO3(H2O)----------------2 CuO + CO2 + H2O
Malachite turns black
gold
The equation is: CaCO3------CaO + CO2
A chemical reaction in a hot air balloon can be when the propane is heated up. That is a chemical reaction because something has heated up.
In order to extract copper from malachite, the malachite must be heated to a high temperature. This produces a fine black powder (copper Oxide). The copper oxide is heated again to a more extreme temperature, this removes the oxygen, leaving metallic copper.
The thermal decomposition in this case is: CuCO3 -------------CuO + CO2
It depends on the reaction temperature. At 298K, the heat of reaction is 179 kJ/mol
The equation is: CaCO3------CaO + CO2
It may speed up when heated.
It is heated.
They do something, or have a chemical reaction
A chemical reaction in a hot air balloon can be when the propane is heated up. That is a chemical reaction because something has heated up.
decomposition
CuO + CH3OH --> HCHO + Cu + H2O
In order to extract copper from malachite, the malachite must be heated to a high temperature. This produces a fine black powder (copper Oxide). The copper oxide is heated again to a more extreme temperature, this removes the oxygen, leaving metallic copper.
The thermal decomposition in this case is: CuCO3 -------------CuO + CO2
It depends on the reaction temperature. At 298K, the heat of reaction is 179 kJ/mol
MgCO3 --(heat)--->MgO+CO2
When manganese dioxide is heated with aluminium powder, the following reaction takes place: These displacement reactions are highly exothermic. The amount of heat evolved is so large that the metals are produced in the molten state. On the other hand when manganese is heated with aluminum oxide no reaction takes place as aluminum is more reactive than manganese and is placed higher in the activity series.