Give as many examples of physicochemical phenomena as you can in your life

For example, the tungsten filament is sublimated by heat, and some lamps have gas in them to emit all kinds of light. It is also like potatoes soaked in water to write on white paper, smeared with iodine water, showing blue handwriting, which can be used as secret stationery! And after baking on the fire, the handwriting disappears and can be used repeatedly!

This contains both physical dissolution and chemical reaction!

In life? For example, spraying insecticides on trees should add surfactants to spread pesticides on the leaves to enhance the insecticidal effect; For example, the shape of water droplets and mercury droplets on the glass sheet is different because of the surface tension;

I'm a junior high school student, but I really like the physics class, and in my opinion, the candle burns, and there is both physical and chemical change.

Fourth, the phenomenon of static electricity in life.

Physics: 1. Standing on the car, the car will come backwards when it starts: inertia 2. The electric light will heat up if it is on for a long time: electrical energy will be converted into light energy and heat energy 3. It will hurt if you punch the wall: reaction force.

4. The sun's rays will feel hot on the body: light energy conversion.

5. Weighing things: the principle of leverage.

6. Taishi Yang Energy Water Heater: Light Energy to Electricity Energy to Heat Energy.

7. The bicycle pedal wheel is larger than the rear gear diameter: the lever principle.

8. Throw two non-ants from the upper floor and land at the same time as the iron ball: gravity 9. The boat floats on the water: the principle of buoyancy.

10. Telescope: Principles of Optics, 7, a lot! As long as you pay attention to everything around you! ,2,Gas combustion 2CO+O2=2CO2

Electric light emits light from electrical energy to light and heat.

Dizzy, twenty each?

Count, 2, the rust in the kettle Pour some vinegar into it It will bubble There is a silica stuffy carbon out Sorry I can't remember, 2,

For example, a few common metastable DU states in bai:

Supersaturated steam. Follow zhi

Phase equilibrium condition DAO should condense into a liquid body but not actually condensed vapor.

Superheat the right solution. A solution that should boil according to phase equilibrium conditions but does not actually boil.

Supercooled solution. A liquid that should have condensed but not condensed according to phase equilibrium conditions.

Supersaturated solution. At a certain temperature, the concentration of the solution has exceeded the saturation concentration, and the solution has not yet precipitated the crystals.

Or some surfactants (e.g. laundry detergent). Surfactants refer to a class of substances that can significantly reduce the surface tension of a solution when added in small amounts.

For example, for a homogeneous thermochemical reaction, for every 10K increase in reaction temperature, the reaction rate constant becomes 2-4 times, which can be used to calculate the shelf life of food.

There are many, many common materialization phenomena (

4 interesting physical phenomena in life that you can do at home.

Physical Phenomena: 1. Salt dissolves in water - dissolves. 2. When the water is not boiled, the water in the upper layer of the boiling kettle is denser than the hot-cold water in the lower layer than the hot water.

3. Today's frozen clothes can also be dried - the sublimation of water. 4. When braking-rolling friction is less than sliding friction. 5. Volatilization of wine aroma - alcohol.

6. Oil floats on the surface of the water - the density of water is greater than that of oil. 7. Chopsticks stuck in the water look like two - the refraction of light. 8. Iron wire can be bent - the ductility of iron.

9. Activated carbon removes refrigerator odor - adsorption. 10. Sugar put in a water cup without stirring the upper layer of water will slowly sweeten - spread.

Chemical phenomenon: 1. Vinegar to remove scale from hot water bottle - acid dissolution, iron rust - oxidation. 3. The longer the wine, the more fragrant it becomes-esterification.

4. Red potion and iodine wine cannot be used at the same time - redox (red potion has reducing properties, iodine wine has oxidizing properties). 5. Eggs will bubble when placed in vinegar - acetic acid and calcium carbonate react to produce carbon dioxide. 6. The mercury thermometer is broken and sprinkled with some sulfur - sulfur reacts with mercury to form mercury sulfide.

7. Silver jewelry will turn black after a long time - silver reacts with sulfur to form silver sulfide. 8. White appliances will turn yellow and oxidize after a long time. 9. Combustion - oxidation.

10. Iron bottles cannot be filled with vinegar - acid can corrode iron.

What does a 15,000-volt high-voltage power source send to the wood?

Lightning-like lines will appear.

The coin melts and discolors when heated.

Ammonium dichromate decomposes like a volcanic eruption.

Calcium gluconate and a little open flame . You try.

After the lithium is ignited = the phone battery cannot be thrown into the fire. The most active metal is lithium, and I believe you have also seen the news of mobile phone batteries** or spontaneous combustion. Different from the existing manganese battery and alkaline dry battery zinc chloride and potassium hydroxide water-soluble electrolyte, lithium battery uses organic solvent, at the same time, its positive electrode is made of manganese dioxide, lead fluoride, sulfur chloride and other materials, and the negative electrode is made of lithium metal foil.

Many of these materials will undergo a violent chemical reaction and release a lot of heat energy after contact with water, and if the temperature gathered in a short period of time is too high, lithium batteries will spontaneously combust and **. Lithium battery cathode.

Nitrogen triiodide is sensitive enough to be detonated by a feather (in fact, you can detonate it with a light wave of air) Snake venom and blood reaction should be ,,, coagulation toxin Snake venom and blood reaction ,,, should be coagulation toxin. If you get this poison, you will become hairy and bloody...

For example, the traditional Taoist priest lied to you and said that "the rune is now a word".

System means that the charm bai paper is soaked in water, and the words will be dun on the paper.

Actually, it's because.

Zhi sprinkled alum dao milk and the like on it After those materials were sprinkled, the paper did not absorb water easily, so the area of the paper was brighter (hence the handwriting).

I tried it with milk and it wasn't very obvious but I did see it.

Dancing eggs Eggs come to the surface when placed in water with a certain salinity--- using the principle of buoyancy.

v It is convenient to replace Netcom Huawei.

Small pieces of foam stick to your hands and can't be shaken off.