1. Consider a stoppered flask containing benzene, iodine, and air, which has reached equilibrium at 298K. Which one of the following statements converning the system at equilibrium is true? a) The pressure of the vapour phase is not constant b) Evaporation of the liquid continues. c) The colour of the liquids phase will change d) The mass of the solid iodine is not constant. 2. Consider the equilibrium represented by the following equation: Heat + H2O(l) <---- -----> H2)(g) in which T = 373K, P= 101kPa a) The total volume of the system is increased. b) Boiling water is added to the system c) Water vapour is removed from the system. d) The system is cooled. 3. Consider the following systems: a) a container that is half-filled with alchol, soppered, and allowed to stand for several days b) crystals of KMnO4 that are dissolved in water until the water becomes a uniform purple colour and a constant amount of crystal remains in the container. c) an ice cube in a beaker of water in a normal classroom d) moth balls that are placed in an empty flask that is then stoppered and allowed to stand for several days Which of the above are in an equilibrium state? i) a and b only ii) a, b, and d only iii) b and c only iv) a, b, c and d Ok for the fist answer 1. it think its b because when the system reaches equailibrium evaporation of the liquid will happen at the same rate that condensation happens. 2. im sorta lost on this one but i think it mite be b because wen you add the boiling water the temperature will go up and so will the kenitic energy. :S please tell me if im on the rite track wit this one. 3. this one i think would be a,b and d because in c the water would evaporate and because of that it would not be in equailibrium.