|Aug11-09, 10:21 PM||#1| Thermal Physics - Dalton's Law etc
Inside the leaf of a plant, water vapour passes from the liquid
phase to the vapour phase at the walls of the mesophyll cells,
as shown in the figure (N/A due to copyright). The water vapour
then diffuses through the intercellular air spaces and
eventually exits the leaf through the stomatal pores. The
diffusion constant for water vapor in air is D = 2.4 x 10−5
m2s−1. A stomatal pore has a cross-sectional area A = 6.8 x
10−11 m2 and a length L = 7.0 x 10−5 m. The plant is being
propagated in a controlled environment: T = 17 °C, relative
humidity 61 %. The saturated vapour pressure of water at 17 °C
is 1.93 kPa. (a) Assuming that the air around the plant is an
ideal gas, what is the concentration of water molecules per
cubic meter in the air? __________ molecules/m³ (b) Given that
the molar mass of water is 18.0 g mol−1, what is the
concentration of water in the air in kg/m³? __________ kg/m³ 2.
Relevant equations - don't know... I know that the parti