Do all liquids have the property of thermal expansion and cold contraction?

1) Mercury. As a laboratory temperature nanometer hailmeter.

and the liquid contained in the body temperature split eggplant calendar, following the law of thermal expansion and cold contraction.

2) Alcohol: As the liquid contained in the thermometer, it follows the law of thermal expansion and cold contraction.

3) Kerosene. As a liquid inside the thermometer, it follows the law of thermal expansion and cold contraction.

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Not all objects (solid or liquid) have the property of thermal expansion and contraction, but most objects do.

For example, common water has abnormal expansion in a certain temperature range. In addition, metals such as antimony, bismuth, gallium, etc. are metals with the properties of heat shrinkage and cold expansion.

The solids, liquids, and gases you are talking about, but antimony and bismuth do not expand and contract, but they do the opposite, but shrink and contract. This shows that not all objects are thermally expanding and contracting.

Thermal expansion and contraction is a basic property of an object, in the general state, the object will expand after being heated, and it will shrink in the cold state. Most objects have this property.

There are many hazards, such as:

In summer, the road surface arches upwards, which is the expansion of the road surface. Therefore, there are gaps left in the cement concrete pavement at intervals) In the same way, there should be gaps between the rails when laying the railway to prevent the deformation of the rails caused by thermal expansion and cold contraction! If the electrician tightens the wire too tightly when erecting the wire, the wire will break in the winter.

Therefore, when the wires are erected in the summer, the wires should be slightly sagging. In summer, the tires of the car should not be pumped too much, otherwise it is easy to have a puncture and so on.

1. Not necessarily.

2. Individual substances may shrink and expand, such as water in 0 4

Water with a temperature below 4 degrees Celsius does not expand and contract. The density of water is the highest at 4, so when the freezing point is between -4, the volume of water gradually decreases with the increase of temperature, which is a typical heat contraction and cold expansion, after the temperature is greater than 4, the volume gradually increases with the increase of temperature. For general objects, thermal expansion and contraction are established, mainly with the increase of temperature, the increase of the kinetic energy of molecules, and the increase of the average free path of molecules, so it is manifested as thermal expansion and contraction.

Water with a temperature below 4 degrees Celsius does not expand and contract. The density of water is highest at 4, so when the freezing point is between -4, the volume of water gradually decreases with the increase of temperature, which is a typical heat contraction and cold expansion, and after the temperature is greater than 4, the volume gradually increases with the increase of temperature. For general objects, thermal expansion and contraction are established, mainly due to the increase in temperature, the increase in the kinetic energy of molecules, and the increase in the average deficit of molecules, so it is manifested as thermal expansion and contraction.

Water with a temperature below 4 degrees Celsius does not expand and contract. The density of water is the highest at 4, so when it is between the freezing point of -4, the volume of water gradually decreases with the increase of temperature, which is a typical quiet heat contraction and cold expansion, and after the temperature is greater than 4, the volume gradually increases with the increase of temperature. For general objects, thermal expansion and contraction are established by side-friends, mainly due to the increase in temperature, the increase in the kinetic energy of molecules, and the increase in the average free path of molecules, so it is manifested as thermal expansion and contraction.

Thermal expansion and contraction: Thermal expansion and contraction refers to the property that an object expands when it is heated and shrinks when it is cold. Since the motion of particles (atoms) in an object changes with temperature, when the temperature rises, the vibration amplitude of the particles increases, causing the object to expand; However, when the temperature drops, the vibration amplitude of the particles decreases, causing the object to shrink.

Substances such as water (below 4°C), antimony, bismuth, gallium, and bronze shrink when heated and expand when cold, contrary to the characteristics of ordinary objects.

1. Water will expand and contract when it is above 4 and expand and contract below 4. And when it comes to ice, the density is only there. This means that the ice will float on the surface. This is almost the case with liquids with a little volatile properties. For example, sodium chloride aqueous solution or something.

2. For general objects, thermal expansion and contraction are established, mainly due to the increase in temperature, the increase in the kinetic energy of molecules, and the increase in the average free path of molecules, so it is manifested as thermal expansion and contraction, but there are exceptions, such as water, which does not mean that thermal expansion and contraction are not valid for water. Rather, there are hydrogen bonds in the water, and when the temperature drops, the number of hydrogen bonds in the water increases, resulting in an increase in volume as the temperature decreases.

3. Thermal expansion and contraction usually refers to the increase in the volume of most substances when the temperature rises under the condition that the external pressure remains unchanged; A phenomenon in which its volume shrinks when the temperature decreases.

4. Generally speaking, the thermal expansion and contraction of the qi old grip car body is the most significant, followed by the liquid, and the solid is the least significant. Because the gravitational force between gas molecules is less than that between liquid and solid molecules, it is easier to be affected by temperature.