Question

The diameter of a H2 molecule is about 2.5 Å. For H2 gas at 0o C and 1 atm, calculate the following. Assume ideal gas. (Note: For the equations that I gave you in class, σ is the diameter. For the equations in the text, the symbol σ is used for the collision cross-section, equal to 4πr 2 , where r is the radius of the molecule. If you decide to use the equations in textbook rather than the ones from the notes, please make sure that you calculate the collision cross-section from the diameter given in the problem.)

(a) Root-mean-square velocity

(b) Average translational energy per mole of H2 molecules

(c) Number of H2 molecules in 1 cm3 of the gas (Hint: Use the ideal gas law.)

(d) Mean free path

(e) Number of collisions each H2 molecule undergoes per second

Answer 1