Description of the partial pressure concept. Ideal gas equation relations involving total pressure, water vapor partial pressure and humidity ratio (absolute humidity).
Thank you . When calculating the Pw , do I use the same volume for Pa? No matter what I do , I can’t get the right answer to match the pressure on my Psychrometric chart. The volume I’m using is 13.5 cubic feet converted to 382.2 liters . I’m converting grains to grams to use for mass and using 62.4 for R. At 80F , 20%RH I should measure .21 inches of mercury , but I’m nowhere near that.
Thank you . When calculating the Pw , do I use the same volume for Pa? No matter what I do ,
I can’t get the right answer to match the pressure on my Psychrometric
chart.
The volume I’m using is 13.5 cubic feet converted to 382.2 liters .
I’m converting grains to grams to use for mass and using 62.4 for R.
At 80F , 20%RH I should measure .21 inches of mercury , but I’m nowhere near that.