How do you calculate the energy required to evaporate 1 kg of water?

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.

How many kwh does it take to evaporate water?

Since the mass of room temp water = approx. 1Kg, this means it would take approx. 7,500 Kilowatt-hours to completely evaporate 1 liter of water in 5 minutes.

What is the rate of evaporation of water?

Evaporation rates are usually expressed as the water depth lost in millimetres over a period of time, e.g., 2 mm/day, 14 mm/week or 60 mm/month.

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 many joules of energy are required to make water evaporate?

Similarly, 2501 J of energy are required to evaporate 1 g of liquid water at 0°C, and this energy is called the latent heat of vaporization. This energy is released when the water vapor subsequently condenses, where it is called the latent heat of condensation.

How do you Calculate evaporation energy from heat?

Most of the heat or energy required for the evaporation is taken from the water itself. To maintain the water temperature – heat must be supplied to the water. Required heat to cover evaporation can be calculated as. q = hwe gs (2) where. q = heat supplied (kJ/s (kW)) hwe = evaporation heat of water (kJ/kg) 1 kW = 3412 Btu/h.

Where does the energy for evaporation of water come from?

Most of the heat or energy required for the evaporation is taken from the water itself. To maintain the water temperature – heat must be supplied to the water. Required heat to cover evaporation can be calculated as.

How do you calculate the energy required to change water to steam?

Use the formula q = m·ΔH v in which q = heat energy, m = mass, and ΔH v = heat of vaporization. The amount of heat required to change 25 grams of water into steam is 56425 joules or 13500 calories. A related example illustrates how to calculate the energy when water changes from solid ice into steam .

How do you Calculate evaporation from a swimming pool?

Evaporation of water from a water surface – like an open tank, a swimming pool or similar – depends on water temperature, air temperature, air humidity and air velocity above the water surface. The amount of evaporated water can be expressed as: g s = Θ A (x s – x) / 3600 (1) or . g h = Θ A (x s – x) where