Is it wrong or right that water only evaporates when it boils?

This is not true, water evaporates all the time, it is just the rate of evaporation.

Evaporation refers to the phenomenon of vaporization that can occur at any temperature and generally occurs on the surface of a liquid. The speed of evaporation is related to the nature of the liquid, the temperature of the liquid, the surface area, surface contaminants (e.g., oil spots, etc.), and the velocity of the air flow near the surface. Like the sea in the ocean in the sun's rays.

Under irradiation, the evaporation phenomenon occurs all the time.

Boiling refers to the phenomenon that when the temperature of the liquid rises to a certain level under a certain pressure, the liquid surface and the inside of the liquid are rapidly vaporized at the same time, and a large number of bubbles emerge. Boiling is related to the nature of the liquid and the ambient pressure. For example, when the water is boiling, we often say that the water is boiling when it is boiling.

Boiling point. When the temperature of the liquid rises to a certain level under a certain pressure, the liquid level and the inside of the liquid are rapidly vaporized at the same time. It's called boiling.

When boiling, a large number of bubbles emerge inside the liquid. At this time, the heat supplied by the outside world is used to change the object from a liquid state to a gaseous state, and the temperature of the liquid does not change, which is called the boiling point.

Wrong! Since the molecules are always in motion, evaporation happens all the time. The water we usually see is composed of many water molecules, and the molecules of liquid water can move freely within a certain range.

Due to the constant movement of molecules, there are some molecules on the surface of the water that run into the air. These water molecules, which run into the air, completely lose their restraint and become water vapor, which is evaporation. The first factor that affects the rate of evaporation is the surface area of the water.

The larger the surface area, the greater the contact with the air, and the more water molecules will run into the air in the same amount of time, and the faster the evaporation. The speed at which the air flows on the surface of a liquid can also affect the rate of evaporation. Some of the water molecules that run into the air will run back to the surface or interior of the liquid, and the faster the air flows, the less chance the water molecules will come back, and the faster the evaporation.

The last factor that affects the rate at which water evaporates is the temperature of the water. The higher the temperature of the water, the more intense the movement of the water molecules, so that the water molecules on the surface of the liquid are more likely to escape into the air.

The water just evaporates more when it boils. Isn't it always evaporating at room temperature? Isn't the water in the outdoor ditch decreasing, which is also evaporation?

So what you're saying is definitely wrong.

1.Evaporation is the vaporization of a liquid at any temperature, whereas boiling is the vaporization of a liquid at a certain temperature (boiling point). 2.

Evaporation is a slow vaporization phenomenon that occurs only on the surface of a liquid, whereas boiling is a violent vaporization phenomenon that occurs simultaneously on the surface and inside the liquid.

Water turns into water vapor and the volume increases! The density is smaller, and the volume becomes larger at the same mass.

Water vapor, is the gaseous form of water (H2O). When water reaches its boiling point, it turns into water vapor. At sea level a standard atmosphere.

, the boiling point of water is or 212°F.

Water can also slowly evaporate into water vapor when it is below the boiling point. In a very low pressure environment (less than atmospheric pressure), ice will directly sublimate into water vapor. Water vapour may contribute to the greenhouse effect.

is a greenhouse gas.

Water vapor, or steam for short, is a gaseous form of water (H2O). When water reaches its boiling point, it turns into water vapor. At one standard atmosphere at sea level, the boiling point of water is or 212°F.

When the mold water is below the boiling point, the water can also slowly evaporate into water vapor.

In a very low pressure environment (less than atmospheric pressure), ice will directly sublimate into water vapor. Water vapor may contribute to the greenhouse effect and is a type of greenhouse gas.

In addition, water vapor is not an energy source, nor is it a secondary energy source, nor is it a renewable energy source, water vapor is just a manifestation of the existence of water in a gaseous state.

Gaseous water is a small but important component of the atmosphere. There is approximately in the troposphere.

Middle. Condensate.

The vapor-to-liquid or ice phase is mainly done by clouds, rain, snow, and other sediments, all of which are also the most important weather elements.

Fog and clouds are formed by condensing the surrounding clouds to condense nuclei. In the absence of nuclei, condensation can only occur at lower temperatures. After continuous condensation or deposition, cloud droplets or snowflakes form and contribute to their critical mass.

Stratosphere. The average residence time of orange round water vapor is about 10 days. Water replenishment, precipitation, evaporation, is the result of transpiration, and other biological and geological processes in oceans, lakes, rivers, and plants.

Measuring water vapor concentrations is expressed as specific humidity or relative humidity.

If precipitation were to condense immediately, the annual global average of water vapor would bring only about 25 millimeters of precipitation across the Earth's surface. However, the average annual precipitation.

about 1 meter, which indicates a quick turnover in the air in water.

Although the amount of gas emitted by volcanoes varies widely, water vapor is always the most common volcanic gas, and more than 60% of the emissions from volcanic eruptions are usually water vapor.

According to the conventional knowledge in chemistry, if you know silver specifically, one mole of gas is liter under the standard situation, so that water vapor should also conform to the law of the banquet, so his volume is of course larger than that of the same weight of water.

Of course, it is the same substance, and it is the same thing that water has changed from liquid to gaseous, and it is the same reason that water freezes, water becomes ice, in fact, it is still water, but the form has changed, it will become water after heating, and water vapor will also become water after condensation.

It's the same substance, but in a different physical form!

It is the same substance, but the heat energy carried by the steam is large.

The similarity between water evaporation and boiling is swift: they are both ways of vaporization of liquids, that is, they are both vaporization phenomena, and liquids need to absorb heat in the process of evaporation and boiling.

The difference between evaporation and boiling of water:

1. Evaporation is the vaporization of a liquid at any temperature (ignored because it is absolute zero.

At this time, the molecules stop moving), and boiling is the vaporization phenomenon that occurs when the liquid is heated at a certain temperature (boiling point) and continues to be heated.

2. The factors that affect the evaporation rate are: the surface area of the liquid.

the temperature of the liquid, the velocity of the air near the surface of the liquid; The factors that affect the boiling point are: the air pressure on the surface of the liquid, how pure the liquid is. Factors that affect the rate of boiling: the volume of the liquid and the original temperature.

3. Evaporation will take place at any temperature, but the higher the temperature, the faster, and vice versa. The boiling must be at the boiling point and continue to absorb heat.

The question is not reasonable.

Water absorbs heat, which increases the kinetic energy of water molecules and turns this part of the water from liquid to gaseous. That is, this part of the water cannot increase the internal energy, and if it increases, the result will be water vapor. Again, the process of boiling water has gone beyond the formula q=cm t.

Similarities: Evaporation and boiling are both vaporization phenomena and both need to absorb heat.

Differences: 1. Different places of occurrence: evaporation is a vaporization phenomenon that only occurs on the surface of the liquid, while boiling is a violent vaporization phenomenon that occurs both inside and on the surface of the liquid.

2. Different temperature conditions: evaporation can occur at any temperature, while boiling occurs at a certain temperature.

3. The temperature change may be different: the liquid needs to absorb heat when it evaporates, and the temperature may decrease; Whereas, heat is absorbed during boiling, but the temperature remains the same.

4. Different degrees of intensity: evaporation is relatively gentle, while boiling is very violent.

5. Different influencing factors: the speed of evaporation is related to the temperature, surface area, and air flow speed of the liquid, and the boiling point is related to the level of atmospheric pressure.