Question

The rates of diffusion of gases will increase with:

• A. increase in pressure
• B. increase in relative molecular mass
• C. increase in temperature
• D. addition of platinum as a catalyst

Answer 1

Answer: (A), (C)

increase in pressure
increase in temperature

With increase in temperature, average kinetic energy of gas will increase. These by velocities and rate of diffusion will increase. When we increase pressure, the gases try to reduce pressure on them and they will diffuse with speed above normal.