Multiple Choice
Which equation represents the Ideal Gas Law?
7. Gases
The Ideal Gas Law
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Which statement best summarizes the relationship described by the Ideal Gas Law?
A
The pressure of a gas is directly proportional to its temperature and volume.
B
The volume of a gas is directly proportional to its temperature and inversely proportional to its pressure.
C
The pressure of a gas is directly proportional to its volume and inversely proportional to its temperature.
D
The volume of a gas is directly proportional to its pressure and temperature.
Verified step by step guidance1
The Ideal Gas Law is expressed by the equation: , where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.
To understand the relationships, rearrange the equation to solve for volume: .
From this rearranged equation, observe that volume (V) is directly proportional to temperature (T) because they are both in the numerator.
Also, notice that volume (V) is inversely proportional to pressure (P) because pressure is in the denominator.
Therefore, the correct relationship described by the Ideal Gas Law is that the volume of a gas is directly proportional to its temperature and inversely proportional to its pressure.
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