SOLAR SYSTEM

UNIVERSE

ATMOSPHERIC BASIC PROPERTIES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When a gas is compressed into a smaller volume, its overall density
A
increases
B
decreases
C
stays the same
D
None of the above
Explanation: 

Detailed explanation-1: -As the compression proceeds the volume of the chamber is decreasing and since mass is same, density increases. Similarly as volume decreases the number of gas molecules colliding with the walls increases as the density increases, so the pressure on the wall also increases.

Detailed explanation-2: -During the process of compression, the volume of gas decreases, and hence the density of gas increases as the mass remains constant.

Detailed explanation-3: -During compression, the volume (V) of a gas decreases. When this happens, the pressure (P) of the gas increases if the number of moles (n) of gas remains constant. If you keep the pressure constant, reducing the temperature (T) also causes the gas to compress.

Detailed explanation-4: -When volume increases, density decreases.

Detailed explanation-5: -Compression increases density. Density of an object does not depend on its size or shape. “Heavier” as applied to a substance is synonymous with “greater density”.

Detailed explanation-6: -The air is compressed. The density increases as pressure increases. Altitude and weather systems can change the air’s pressure. As you go higher, the air’s pressure decreases from around 1, 000 millibars at sea level to 500 millibars at around 18, 000 feet.

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