How will temperature affect the pressure and the volume of a gas?

Answer 1

heat makes gas expand and cold makes gas liquify

Answer 2

All gasses can be explained in the Ideal Gas Law which is as follows:

pV=nRT

where p is the absolute pressure of the gas, V is the volume of the gas, n is the number of moles of gas, R is the universal gas constant, T is the absolute temperature.

You could also use the more simple equation:

pV/T = C

where p is the absolute pressure of the gas, V is the volume of the gas, T is the absolute temperature of the gas, C is a constant.

From this we can deduce that with increased temperature you get increased volume in the following way:

(presume P = 1 and C = 1)

when T = 1:

1xV/1 = 1 therefore V = 1

When T = 2:

1xV/2 = 1 therefore V = 2

From the same equation, we can deduce that with increased pressure you get decreased volume in the following way:

(presume T = 1 and C = 1)

when P = 1:

1xV/1 = 1 therefore P = 1

When P = 2:

2xV/1 = 1 therefore P = 0.5

SUMMARY:

To summarise,

Volume and temperature are proportional Volume and pressure and inversely proportional
Increasing temperature of a gas causes it to try to expand. If it is in a rigid container the internal pressure increases instead. This is the principle behind a steam engine; the hotter the steam the more internal pressure it has and the more it volume it wants to fill. That pressure can be used to move a piston, allowing the steam to fill more volume as it drives the piston down a cylinder.

Increasing pressure around a gas causes it to contract, and decreasing pressure around it causes it to expand. A good example is an air balloon that you submerge in water. The deeper you go the smaller the balloon becomes as the pressure around it increases. Helium balloons pop as they go up into the air because the pressure around the balloon continues to decrease as it rises making the pressure inside stretch the balloon until it pops.

Answer 3

as the temperature increases the partcles gain kinetic energy and begins to collide against the walls of the container with more force. hence pressure increases as the temperature increases the partcles gain kinetic energy and begins to move faster. this causes the gas to expand

Answer 4

Pressure is inversely proportional to volume. So when pressure increases, volume decreases. (as per Boyle's law)

Temperature is directly proportional to volume. So when temperature increases, volume increases. (as per Charles's law)