At 328 K the vapour pressure of acetone, (CH₃)₂CO, is 98.9 kPa, and that of chloroform, CHCl₃, is 84.4 kPa. What would be the vapour pressure of a solution composed of 100 g of acetone and 113 g of chloroform if it exhibited ideal behaviour (i.e. obeyed Raoult’s Law)? Give your answer in units of kPa (just type in numerical answer)

Superoxide salts are used to generate oxygen gas on space flights and submarines. Superoxides undergo hydrolysis (a reaction with water) to generate oxygen gas, hydrogen peroxide and potassium hydroxide:

2KO₂(s) + 2H₂O(g) → 2KOH(s) + H₂O₂(g) + O₂(g)              Δ_rxnH° = +64.95 kJ mol^–1    reaction 1

H₂O₂(g) → H₂O(g) + ½O₂(g)                                              Δ_rxnH° = –146.9 kJ mol^–1     reaction 2

2KOH(s) + CO₂(s) → K₂CO₃(s) + H₂O(g)                              Δ_rxnH° = –146.9 kJ mol^–1     reaction 3

KOH(s) + CO₂(s) → KHCO₃(s)                                              Δ_rxnH° = –145.0 kJ mol^–1     reaction 4

4KO₂(s) + 4CO₂(g) + 2H₂O(g) → 4KHCO₃(s) + 3O₂(g)         Δ_rxnH° = ?                           reaction 5

Consider a reaction that has ΔH = 654 kJ/mol and ΔS = − 125 J/mol

Which of the following statements about the spontaneity of the reaction applies to this reaction?

Which of the following molecules has the largest van der Waals b constant?  

What characteristics would you expect to find in the respiratory exchange surface of an aquatic water-breathing animal with a high metabolic rate and therefore a high demand for oxygen?