Why latent heat of vaporization of steam is more than that of the boiling water?

Why latent heat of vaporization of steam is more than that of the boiling water?

Answer: The Latent Heat of steam is higher than of water at the same temperature because the particles of steam move with a greater speed than of water. This proves that the latent heat of steam is higher than that of water.

Why is latent heat of vaporization of a material greater than that of latent heat of fusion?

The latent heat of vaporization is higher than the latent heat of fusion since gas molecules have the largest intermolecular space and the force of attraction between the molecules is almost negligible. Therefore, more energy is required to convert liquid to gas.

Why does water have a large latent heat of vaporisation?

Water forms fairly strong bonds with itself, for a liquid, and so has a very exothermic (negative) heat of condensation. In reverse this gives it a very high heat of vaporisation: a lot of energy is required to turn it into a gas.

Why does steam cause more severe burns than boiling water or steam Class 9?

Answer: Steam produces more severe burns than boiling water even though both are at 100oC because steam contains more heat, in the form of latent heat, than boiling water.

Does water have a high latent heat of vaporization?

That is, water has a high heat of vaporization, the amount of energy needed to change one gram of a liquid substance to a gas at constant temperature. This is because the molecules with the highest kinetic energy are lost to evaporation (see the video on evaporative cooling for more info).

What is the latent heat of vaporisation of water?

For the water substance at 1 atm and 100 °C (the boiling point of water at 1 atm), the latent heat of vaporization is 2.25 ÷ 106 J kg21. The latent heat of condensation has the same value as the latent heat of vaporization, but heat is released in the change in phase from vapor to liquid.

Why does heat of vaporization decreases with increasing pressure?

As the density of liquid decreases, the intermolecular attractive forces decrease with distance, and thus the heat of evaporation decreases. 2) The vapour is compressed under increasing vapour pressure.

Why is a steam burn more severe?

Causes. When water reaches boiling point (212 degrees Fahrenheit) and turns to steam, this results in super-heated molecules that can cause nearly instantaneous scalding if they come into contact with body tissues. Steam is more likely to cause burn injuries than boiling water because of the latent heat of vaporization …

Why does steam have more heat than boiling water?

Steam has more energy than boiling water. It possesses the additional latent heat of vaporization. So, when steam falls on skin and condenses to produce water it gives out 22.5 x 105 J/kg more heat than boiling water at the same temperature. Also Know, is steam hotter than fire?

Why is the latent heat of vapourization greater?

The energy required to completely separate the molecules, moving from liquid to gas, is much greater than if you were just to reduce their separation, solid to liquid. Hence the reason why the latent heat of vapourization is greater that the latent heat of fusion. Was this answer helpful?

Why are steam burns more dangerous than water burns?

This understanding now also explains why steam burns are generally much more painful and dangerous than water burns. If the relatively cool skin comes into contact with water vapor (steam), the water condenses there and heat of condensation is released and transferred to the skin.

What happens when water is heated to the point of evaporation?

When water is heated it evaporates, which means it turns into water vapor and expands. At 100℃ it boils, thus rapidly evaporating. And at boiling point, the invisible gas of steam is created. The opposite of evaporation is condensation, which is when water vapor condenses back into tiny droplets of water.