High temperature and low pressure.
High temperature because this speeds up the rate of the molecules so there is less intermolecular forces of attraction between particles.
Low pressure because the greater the distance of the particles and the less molecular forces of attraction between particles.
Atmospheric pressure and temperatures well above the boiling point of the gaseous element.
An ideal gas is a theoretical gas composed of a set of randomly-moving, non-interacting point particles. The ideal gas concept is useful because it obeys the ideal gas law. At normal conditions such as standard temperature and pressure, most real gases behave qualitatively like an ideal gas. Many gases such as air, nitrogen, oxygen, hydrogen, noble gases, and some heavier gases like carbon dioxide can be treated like ideal gases within reasonable tolerances.
Under ideal conditions, population increases.
low pressure and high temperature
less electrons = more ideal
CO2 can behave like an ideal gas, but is not an ideal gas. Depending on the temperature and amount of pressure applied, virtually all gasses can behave as ideal gasses. The ideal gas equation can be used on CO2 as a good approximation. (P = nRT/(V-nb) - an^2/V^2)
An ideal gas is a theoretical gas composed of a set of randomly-moving, non-interacting point particles. The ideal gas concept is useful because it obeys the ideal gas law. At normal conditions such as standard temperature and pressure, most real gases behave qualitatively like an ideal gas. Many gases such as air, nitrogen, oxygen, hydrogen, noble gases, and some heavier gases like carbon dioxide can be treated like ideal gases within reasonable tolerances.
helium behaves more ideally.... all the conditions for an ideal gas are almost the same in he and hydrogen except hydrogen is diatomic so it has forces of attraction and helium is monoatomic.
Gases show least ideal behaviour at 1- high pressure and 2- low temperature.
Water does not behave exactly like an ideal gas because water is a polar molecule. And, the polar molecules of water, if properly oriented in space, have strong attraction to one another, and may form a hydrogen bond and condense back into liquid form. Also, when a gaseous water molecule has a collision with liquid water, if it is oriented in the right way (i.e. an oxygen atom comes into contact with a hydrogen atom), it will move back into the liquid phase. So, because water molecules move back into the liquid phase much more easily than ideal gas molecules, water vapor does not behave exactly as an ideal gas would.
Under ideal conditions, population increases.
The pressure is never low enough, nor the temperature high enough to get a perfect match; but at room temp it comes pretty close. This is the answer: 750 K and 20 kPa (I AM THE WISEONE!!)
During low pressure, and low temperature conditions
No, no real gas is actually an ideal gas.
Generally, the lower the temperature, the less ideally a gas behaves. The main reason for this is that in an ideal gas, intermolecular forces are ignored. The slower the molecules go, the bigger the influence of intermolecular forces, the less ideal the gas.
Moustache
NH3, as in Ammonia, like all real gases, are not ideal. Ideal gases follow the ideal gas laws, but ammonia does not adhere to a few of them. First of all, the volume of its molecules in a container is not negliggible. Next, NH3 molecules have intermolecular hydrogen bonding, which is a strong intermolecular bond. Thus, the forces of attaction between molecules is not neglible. All real gases have a certain degree of an ideal gas, but no real gas is actually ideal, with H2 being the closest to ideal.
remember that the posted speeds are intended only for the most ideal conditions