Which of the following best describes the difference between gas diffusion and gas effusion?

W) Diffusion occurs at constant temperature while effusion occurs at variable temperatures

X) Diffusion can occur with any gas while effusion occurs only with certain gases

Y) Diffusion involves gas molecules at the same total pressure while effusion involves gases

moving from high pressure to low pressure

Z) Diffusion is mass dependent while effusion is mass independent
Y) DIFFUSION INVOLVES GAS MOLECULES AT THE SAME TOTAL PRESSURE