Which number in this diagram represents the process of water vapor becoming liquid.

1

2

3

4

Option (c) is the correct answer.

Explanation:

The diagram represents water cycle. Step 1 shows liquid water from the sea evaporates into the atmosphere in step 2.

Then step 3 shows that water in the form of vapor again changes into liquid state and reaches back into the sea in step 4.

Hence, we can conclude that number 3 in this diagram represents the process of water vapor becoming liquid.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"