Want this question answered?
Pressure will be decreased
If a fixed volume of gas increases in temperature, it must increase in volume. If the gas is in a closed system, the pressure inside that system increases instead. When the gas increases in volume, it also decreases in pressure, often rising above colder, more dense gas if possible.
The frequency of collisions is reduced
The volume of a given mass of gas at a constant pressure varies directly with its temperature. This means that, at constant pressures, the volume of a given mass of an ideal gas will increase or decrease by the same factor as its temperatures increases or decreases. For example, if 20 liters of a gas at 283 K was then raised to the temperature of 300 K, the volume would increase to 21.2 liters.Mathematically:V1 / T1 = V2 / T2
Boyle found that when the pressure of a gas at constant temperature is increased the volume of a gas decreases. P x V is a constant at constant Temperature Boyle's Law: P1V1 = P2V2
Pressure will be decreased
As you decrease the volume, the pressure will increase proportionally, and if you increase the volume, then the pressure will decrease.
Increases in direct proportion to the increase in temperature (on an absolute scale).
If a fixed volume of gas increases in temperature, it must increase in volume. If the gas is in a closed system, the pressure inside that system increases instead. When the gas increases in volume, it also decreases in pressure, often rising above colder, more dense gas if possible.
The frequency of collisions is reduced
If the volume of the container is not fixed, increasing the temperature will cause a gas to expand (increase the volume), and contract when cooled (decreasing the volume). This would be the case for a gas inside a piston, or inside a rubber balloon. If the volume is fixed, then increasing the temperature will increase the pressure, and decreasing the temperature will decrease the pressure. This would be the case for a gas in a closed solid container, like a canister or sealed metal box. Increasing pressure will cause the gas to contract (reducing the volume), and decreasing the pressure will cause the gas to expand (increasing the volume). Again, this is if the volume is not fixed. If the volume is fixed, then increasing the pressure will increase the temperature, and decreasing the pressure will decrease the temperature. These concepts are all determined by something called the Ideal Gas Law. To find out more about how this works, see the Related Questions links below this answer. Gases can also be changed to a liquid or solid if the temperature is too low or the pressure is too high. As an example steam changes to a liquid when it touches a cold object, and nitrogen gas can be converted to liquid nitrogen by compressing it to very high pressures.
For an enclosed gas (contained in a fixed volume), the pressure increases as temperature increases.Another way to picture this is that at higher temperatures, the gas molecules colliding with the walls of the container are more energetic, so the force exerted (pressure) is greater.
Decrease its pressure.
decreases
decrease
Solids have a fixed volume or shape at room temperature or pressure.
no, no gas does, it depends on temperature and pressure.