Can I equate higher concentration to higher pressure?

Question

When thinking about the molecules and how there will be more molecules per unit area in both higher concentration and higher pressure substances?

Answer 1

All things being equal, yes.

for an ideal gas, PV = nRT

So to be exact, concentration (goes like n/V) is proportional to pressure over temperature.

So if you squeeze the stuff in isothermally (ie you're in thermal equilibrium with surroundings at some temperature), pressure will go up. In practice, squeezing stuff in tends to drive the temperature up, which drives pressure up even MORE.

Answer 2

Assuming we're talking about a gas, no. You can have a case where the concentration (I assume you really mean density here) is higher, but the temperature is lower, and hence the pressure can be the same or even lower. Read about the ideal gas law, PV=nRT.

Answer 3

Yes and no. In talking about gases, higher concentration will lead to higher pressure. However, higher temperature will also lead to higher pressure without altering the concentration of the gas.

Answer 4

Maintaining the same volume and temperature, the addition of more molecules will increase pressure and therefore concentration..

Maintaining the same temperature, compression of a gas will decrease volume and therefore increase the concentration.