Wednesday

September 24, 2014

September 24, 2014

Posted by **Ashley** on Thursday, April 9, 2009 at 1:38am.

divided by the area upon which the atmosphere is pushing. The metric units of pressure are Newtons/m2

(also called a Pascal; you might also have heard of pounds per square inch [PSI], which is the English units

equivalent).

The surface (atmospheric) pressure on Venus is around 90 bars (surface pressure on the Earth is 1 bar, by

definition). Venus’ atmosphere is 96% CO2, compared to 0.035% in the Earth’s atmosphere. How much CO2

is in the Earth’s atmosphere? To simplify this calculation, you can assume that the Earth’s atmosphere is

uniformly dense and has a height of 10 km (this is the Earth’s atmospheric scale height.). The density of air

is around 1 kg/m3.

- Astronomy -
**drwls**, Thursday, April 9, 2009 at 6:11amYou don't need to know the Venus data to answer this problem.

The TOTAL CO2 on Earth is

(Earth area)*10^4 m*(air density)*3.5*10^-4,

assuming 3.5*10^-4 is the mass fraction of CO2. That is obsolete data, and whoever provided the problem should have stated if it was a mass or volume fraction.

Actually, 3.8^10^-4 is the current mole or volume fraction of CO2. The value of the present CO2 MASS fraction is 5.8*10^-4

You will need the Earth's surface area to complete the problem.

**Answer this Question**

**Related Questions**

Physics - By how much does the H20 pressure exceed atmospheric pressure at 3 ...

Physics - The atmosphere of Mars exerts a pressure of only 600 Pa on the surface...

PHYSICS - The cross-sectional area of the U-tube shown below is uniform and is ...

PHYSICS - The cross-sectional area of the U-tube shown below is uniform and is ...

Physics - The cross-sectional area of the U-tube shown below is uniform and is ...

physical science - which of newton's laws (1, 2, or 3)are used in the following...

Thermodynamics - 3. A gas is confined in a 0.47-m-diameter cylinder by a piston...

Physics - Saturn’s largest moon, Titan, is actually larger than the planet ...

science - 1. Force exerted on an area is called _____. (1 point) pressure ...

math - The head of a round piston has a pressure of 210 psi pushing down on it. ...