What is the change of entropy for 1/2 mol of nitrogen gas being mixed with 1/2 mol of oxygen gas at standard temperature and pressure (stp)? (express answer in units of j/k or j/kmol)

2. what is the change of entropy for one third (1/3) mole each of nitrogen, oxygen and carbon dioxide gases mixed at stp? (express answer in units of j/k or j/kmol)

3. sulfur dioxide gas (so2 (g)) can react with the oxygen gas (o2 (g)) in air to create sulfur trioxide gas (so3 (

(a) find the equilibrium ratio of sulfur trioxide to sulfur dioxide gas at standard conditions in air at 25oc and 1 atm. you can assume that air is 20% oxygen and 80% nitrogen gas by volume.

(b) so3(g) can further react with water vapor to form sulfuric acid, h2so4 (g). air that is in equilibrium with liquid water at 25oc has a partial pressure of h2o (g) of 0.05 atm. find the equilibrium ratio of partial pressures of h2so4 (g) to so3 (g) in air at 25oc.