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Author Question: Which of the following are true about molecular water vapor? 1. Water vapor exhibits kinetic ... (Read 96 times)

a0266361136

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on: Jul 16, 2018
Which of the following are true about molecular water vapor? 1. Water vapor exhibits kinetic activity. 2. Molecular water vapor can be seen. 3. Water vapor exerts pressure.
 
  a. 1 and 2 only
  b. 2 and 3 only
  c. 1, 2, and 3
  d. 1 and 3 only

Question 2

What occurs during the evaporation of water?
 
  a. The adjacent air is warmed.
  b. The adjacent air is cooled.
  c. The water temperature rises.
  d. Heat is given up to the air.


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SeanoH09

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
To be distinguished from visible particulate water, such as mist or fog, this invisible gaseous form of water is called molecular water. Molecular water obeys the same physical principles as other gases and therefore exerts a pressure called water vapor pressure.

Answer to Question 2

ANS: B
As the surrounding air loses heat energy, it cools. This is the principle of evaporation cooling.


a0266361136

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Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it

mohan

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Reply 3 on: Yesterday
Gracias!

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