If two gases are present in a container, the total pressure in the container is equal to
A)the sum of the pressures that are exerted by each of the two gases.
B)twice the sum of the pressures that are exerted by the individual gases.
C)the sum of the pressures that each gas would exert if they occupied twice the volume.
D)the sum of the pressures that each gas would exert if they occupied half the volume.

Question

If two gases are present in a container, the total pressure in the container is equal to
 A)the sum of the pressures that are exerted by each of the two gases.
B)twice the sum of the pressures that are exerted by the individual gases.
C)the sum of the pressures that each gas would exert if they occupied twice the volume.
D)the sum of the pressures that each gas would exert if they occupied half the volume.

academicgurusinc · Answer

This concept has to do with partial pressure. Note the following:

In a mixture of gases, each gas has a partial pressure which is the hypothetical pressure of that gas if it alone occupied the volume of the mixture at the same temperature. The total pressure of an ideal gas mixture is the sum of the partial pressures of each individual gas in the mixture.

The formula is represented by the equation:
Pt = P1 + P2 + ...

Pt is the total pressure of all the combined gases
P1 is the partial pressure for gas 1
P2 is the partial pressure for gas 2 
It can go on until you include all the gases in the system.

academicgurusinc · Answer

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