Question

5. How is density affected by pressure?​

Answer 1

Answer:

Density is directly proportional to pressure and indirectly proportional to temperature. As pressure increases, with temperature constant, density increases. Conversely when temperature increases, with pressure constant, density decreases.

Explanation:

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As the molecules of substance come close to each other the density of substance increses and as the molecules of substance goes far away from each other the density of substance decreases.

When you increasing the pressure:

At microscopic level, in liquids there is very less or negligible free space available to compress more that's why there is no or negligible effect of pressure on the density of liquid.

At atmospheric temperature when you decrease the pressure :

over liquid it's vapour pressure (decrease in boling point) will increase and liquid will start to vaporise and as you decrease the more pressure your liquid tend more, to become vapour and as you know the density of vapour is less than the liquid, the density of liquid will decrease as you decrease the pressure.