12.6 COOLING BY EVAPORATION

Question 1

Are average speed of particles and the temperature of liquid proportional?

Answer 1

Yes

Question 2

What happens to the average speed of particles when the temperature is higher?

Answer 2

It becomes higher

Question 3

Do particles have uniform speed?

Answer 3

No

Question 4

How is energy transferred in particles?

Answer 4

Particles collide with each other

Question 5

Some particles at the surface will travel fast enough to escape into the air.
When a fast-moving particle escapes, what’s left behind?

Answer 5

Slower particles

Question 6

What happens when a fast-moving particle escapes and leaves slower particles behind?

Answer 6

It decreases the average speed, cooling the liquid and thus, the temperature decreases

Question 7

What happens to cooler particles left in the liquid?

Answer 7

They absorb more energy from the surroundings to reach equilibrium

Question 8

The air around the liquid is cooler, why?

Answer 8

Energy has been absorbed by the liquid particles