Table of Contents
- 1 How much energy does it take to evaporate?
- 2 How much energy would it take to evaporate the ocean?
- 3 Why is energy needed for evaporation?
- 4 How much of the Earth’s water is in our oceans?
- 5 How do you calculate the amount of heat needed to vaporize?
- 6 How much energy does it take to evaporate 1 Litre of water at 100oc?
How much energy does it take to evaporate?
energy known as the latent heat of vaporization is required to break the hydrogen bonds. At 100 °C, 540 calories per gram of water are needed to convert one gram of liquid water to one gram of water vapour under normal pressure. Water can evaporate at temperatures below the boiling…
How much energy would it take to evaporate the ocean?
Evaporation below 100 °C and sublimation require more energy per gram than 540 calories. At 20 °C (68 °F) about 585 calories are required to vaporize one gram of water. When water vapour condenses back to liquid water, the latent heat of vaporization is liberated.
What is the energy needed to evaporate 1 kg of water?
Even more energy is required to vaporize water; it would take 2256 kJ to change 1 kg of liquid water at the normal boiling point (100ºC at atmospheric pressure) to steam (water vapor).
Why is energy needed for evaporation?
Substances with very strong intermolecular forces (like water) require a comparatively greater amount of energy to separate. For example, a great deal of energy is needed to convert liquid water to water vapor because water molecules have a particularly strong form of intermolecular attraction called hydrogen bonding.
How much of the Earth’s water is in our oceans?
96.5 percent
About 71 percent of the Earth’s surface is water-covered, and the oceans hold about 96.5 percent of all Earth’s water.
How many joules does it take to evaporate water?
For water at its normal boiling point of 100 ºC, the heat of vaporization is 2260 J g-1.
How do you calculate the amount of heat needed to vaporize?
Use the formula q = m·ΔHv in which q = heat energy, m = mass, and ΔHv = heat of vaporization.
How much energy does it take to evaporate 1 Litre of water at 100oc?
1 liter of water has a mass of 1 kg. If the water starts off at 100 degrees C, then the energy required to evaporate it would be 540,000 calories or 2.3 x 10^6 Joules.