g A sample of nitrogen gas is in a sealed container with a constant volume. Heat is added to the gas. The pressure . A sample of nitrogen gas is in a sealed container with a constant volume. Heat is added to the gas. The pressure . increases decreases stays the same can't be determined with the information given

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.