As always… Lon-Capa assignments Lecture videos Textbook Read Do text homework Chapter 6 (Chemical Equilibrium) for Wednesday!

Clicker Question Consider two 1.00 mol samples of He(g) each in identical 1.00 L containers. Sample 1 has a temperature of 136.5°C and Sample 2 has a temperature of –136.5°C. Determine the following ratio of ZA(2)/ZA(1) in the two containers. a) 0.333 b) 0.577 c) 1.00 d) 1.73 e) 3.00  

Collision Frequency  

Clicker Question Consider two 1.00 mol samples of He(g) each in identical 1.00 L containers. Sample 1 has a temperature of 136.5°C and Sample 2 has a temperature of –136.5°C. Determine the following ratio of ZA(2)/ZA(1) in the two containers. a) 0.333 b) 0.577 c) 1.00 d) 1.73 e) 3.00  

(Δmom per impact w/ walls)2:(Δmom per impact w/ walls)1 Clicker Question Consider two 1.00 mol samples of He(g) each in identical 1.00 L containers. Sample 1 has a temperature of 136.5°C and Sample 2 has a temperature of –136.5°C. Determine the following ratio of (Δmom per impact w/ walls)2:(Δmom per impact w/ walls)1 in the two containers. a) 0.333 d) 1.73 b) 0.577 e) 3.00 c) 1.00  

Chapter 5: Previous Exam Problem The formula for mean free path is  = One assumption of the kinetic molecular theory is that gas particles do not interact with each other at all. That is, the gas particles collide with the walls of the container but not with each other. Suppose you have helium gas at 25°C in a 1000.-L cubic container (such that each side of the cube is 1.000 m, since 1m3 = 1000 L). Determine the range of pressures that would make this assumption valid. Explain the significance of your answer. [Note: use 3.2 x 10-11 m as the diameter of a helium atom]