Which of these actions will enhance the rate of evaporation of water?

Blowing wind over the surface of water.

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Providing more heat to the water.

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Increasing the water's surface area of contact with air.

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Covering it completely with a lid.

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Solution

The correct options are
A Blowing wind over the surface of water.
B Providing more heat to the water.
C Increasing the water's surface area of contact with air.
When wind is blown on the surface of water, more number of molecules are blown away from the vicinity of the water. Also, providing more heat to the water results in more energy of the molecules on surface, which means, more number of molecules acquire enough energy to escape the bulk of water. Increasing surface area of the water would mean more number of molecules on the surface of water and hence, more evaporation rate. All of these actions resulting in the outcome of more rate of evaporation.

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Q. Question 9
Which condition out of the following will increase the evaporation of water?
(a) Increase in temperature of water
(b) Decrease in temperature of water
(c) Less exposed surface area of water
(d) Adding common salt to water

Q. Question 9
Which condition out of the following will increase the evaporation of water?
(a) Increase in temperature of water
(b) Decrease in temperature of water
(c) Less exposed surface area of water
(d) Adding common salt to water

Read the following passage and answer the (four) items that follow:

The transfer of heat and water vapor from the ocean to the air above it depends on disequilibrium at the interface of the water and the air. Within about a millimeter of the water, air temperature is close to that of the surface water and the air is nearly saturated with water vapor. But the differences, however small, are crucial, and the disequilibrium is maintained by air near the surface mixing with air higher up, which is typically appreciably cooler and lower in water-vapor content. The air is mixed by means of turbulence that depends on the wind for its energy. As wind speed increases, so does turbulence, and thus the rate of heat and moisture transfer. Detailed understanding of this phenomenon awaits further study. An interacting and complicating phenomenon is wind-to-water transfer of momentum that occurs when waves are formed. When the wind makes waves, it transfers important amounts of energy—energy that is therefore not available to provide turbulence

Q26. According to the passage, wind over the ocean generally does which of the following?

1. Causes relatively cool, dry air to come into proximity with the ocean surface.

2. Maintains a steady rate of heat and moisture transfer between the ocean and the air.

3. Causes frequent changes in the temperature of the water at the ocean’s surface.

What will happen to the iron if it is completely immersed in water, with water having a layer of oil on its surface to avoid the interaction with air?

Q. Which of the following statements are correct regarding evaporation from water bodies :-

1. As the wind velocity increases, the rate of evaporation increases.

2. Saline water is more evaporable than potable water under identical climatic conditions.

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