Can you give me a summary of the conditions for those reactions in junior high school is heating, or

Most of the decomposition reactions are heating reactions (calcium carbonate decomposition), all solid reactions must be heated (soda lime and ammonium chloride solid ammonia gas), and many solid-liquid reactions are heated (copper and dilute nitric acid to NO), because this reaction will be carried out faster. The solid-gas reaction generally involves heating (hydrogen, CO reduction of copper oxide).

Reactions in solution, especially metathesis reactions, generally do not require heating.

In the high-temperature reaction, only calcium carbonate is decomposed, coke is iron-made, and hydrogen is reduced to copper oxide.

A lot of the heating is an endothermic reaction (and some are not, note!). Like the reaction between silicon and oxygen, because silicon is in the A group, like carbon, the chemical properties are not reactive, so the reaction needs to be heated.

One. The main exothermic reactions that junior high school requires to know are:

1.All combustion reactions (must be mastered).

2.The reaction of acids with metals (must be mastered).

Reaction with metal oxides (understood).

4.All the slow oxidation, such as iron rusting, brewing, food decay, respiration of people and animals and plants, etc.

Two. Endothermic reactions that junior high school needs to know.

High temperature ==2c0 (mastery).

High temperature ==cao+CO2 (understand).

Three. Junior high school needs to know about the thermal effects of the dissolution process.

When concentrated sulfuric acid is dissolved in water, the temperature of the solution increases.

After the ammonium salt is dissolved, the temperature of the solution decreases.

1) Copper is heated in air: Cu + O2 = Heating CuO2) Boyle studies the composition of air experiments: 2Hgo = Heating = Hg + O2 3) Heating potassium permanganate:

2kmNO4 heats K2mNO4 + MMO2 + O2 (one of the principles of oxygen production in the laboratory).

4) Hydrogen reduced copper oxide: H2 + Cuo heating H2O+Cu5) magnesium reduced copper oxide: mg + cuo heating Cu + MGO6) Carbonic acid is unstable and decomposed:

H2CO3 == H2O + CO2 (this reaction can be heated or not, heating is faster).

7) Carbon monoxide reduction copper oxide: CO+ Cuo heating Cu + CO2

One. The main exothermic reactions that junior high school requires to know are:

1.All combustion reactions (must be mastered).

2.The reaction of the acid skin with the metal (must be mastered).

Reaction with metal oxides (understood).

4.All the slow oxidation, such as iron rusting, burning repentance and brewing, food decay, respiration of people and animals and plants, etc.

Two. Endothermic reactions that junior high school needs to know.

High temperature ==2c0 (mastery).

High temperature ==cao+CO2 (understand).

Three. Junior high school needs to know about the thermal effects of the dissolution process.

When concentrated sulfuric acid is dissolved in water, the temperature of the solution increases.

After the ammonium salt is dissolved, the temperature of the solution decreases.

The endothermic reactions and exothermic reactions that junior high school requirements to know mainly include:

1. All combustion reactions (exothermic reactions).

2. The reaction between acid and metal (filial piety exothermic reaction).

3. Reaction (exothermic reaction) with metal oxides

4. All slow oxidation, such as iron rusting, brewing, food decay, and the respiration of people and animals and plants, etc., should be cautious. (exothermic reaction).

5. CaO+H O==Ca(OH) (exothermic reaction) 6. Co+C=2Co (endothermic reaction).

7. Caco = Cao + Co (endothermic reaction) <>