Question

Explain in terms of particle collisions and Dalton’s law why it can be assumed that the total pressure inside the gas collection tube is equal to the atmospheric pressure outside of the tube.

Answer 1

I'm not sure what tube you're referring to. The force imparted by collisions of particles translates into pressure (which is a given force by unit area). Dalton's law deals with partial pressures (of ideal gases), such that 1 mole of any gas exerts the same pressure (i.e. force per unit area) as another mole of any other gas. You can sum up the individual partial pressures of a mixture of gases to find the total pressure of the system.