Lecture 1

L1 /

CH3041

GAS LAWS

Dalton’s Law:

pTotal = S pi

Henry’s Law:

[i ] = pi KH

Barometric Law:

pz = po e(-z / H)

pz = p at altitude z (km) po = p at sea level

H is the scale height = RT / M g

= 8.4 km for lower troposphere,

= increase in height nec. for p to fall to p /e

• The barometric law applies to pTotal and pi

• At 5.8 km pO2 = 50% of pO2 at sea level

Z
8.8 km


	Exponential constant e = 2.718