At 300 k, a real gas has the following data: (p = 0.500 mpa, vm = 4.9736 dm/mol) and (p = 1.500 mpa, vm = 1.6483 dm/mol). if this real gas behaves like the van der waals gas (p = -2). determine the van der waals parameters a (in atm dm®/mol) and b (in dm®/mol). (b) (15pt) determine the value of the second virial coefficient at 600 k for the above gas based on the van der waals gas.

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.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.