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Chapter 2

# Chapter 2 Problems.pdf

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University of British Columbia

Chemistry

CHEM 302

Michael Wheeler

Fall

Description

21
PROBLEMS
2. 1 Scale height of the Martian atmosphere
On Mars the atmosphere is mainly CO , th2 temperature is 220 K, and the
-2
acceleration of gravity is 3.7 m s . What is the scale height of the Martian
atmosphere? Compare to the scale height of the Earth’s atmosphere.
2. 2 Scale height and atmospheric mass
Many species in the atmosphere have mass concentrations that decrease roughly
exponentially with altitude:
z
ρ(z =ρ (0 exp —--- (1)
h
where h is a species-dependent scale height.
1. If ρ(z) is horizontally uniform, show that the total atmospheric mass m of such
a species is given by
mA= ρ()0 h (2)
where A is the surface area of the Earth.
2. Equation (2) allows a quick estimate of the total atmospheric mass of a species
simply f

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