Question:
The relative humidity of air equals the ratio of the partial pressure of water in the air to the equilibrium vapor pressure of water at the same temperature times 100%. If the relative humidity of the air is 58% and its temperature is 68 oF , how many moles of water are present in a room measuring 12 ft x 10 ft x 8 ft?
Answer:
15.1379 moles of water are present in a room measuring 12 ft x 10 ft x 8 ft.
Explanation:
Given:
Relative humidity of the air = 58%
Temperature =
To Find:
Number of moles of water are present in a room measuring 12 ft x 10 ft x 8 ft = ?
Solution:
Converting temperature Fahrenheit to Celsius
The vapour pressure of is equal to 17.54 torr
vapour pressure of air
= torr
= 10.17132 torr
Volume of the room =
=>
=>
Using the ideal gas equation
PV = nRT
Volume in Litres = 27184.2 L
Pressure in atm
=
= 0.0133945 atm
Now substituting the values we get
Pv = nRT
n = 15.1379 moles
I can’t see the picture properly...
It's an alkali metal so one, they sit on the very first of the column in the periodic table :DDDD