300 ml of a 0.694 m hcl aqueous solution is mixed with 300 ml of 0.347 m ba(oh)2 aqueous solution in a coffee-cup calorimeter. both the solutions have an initial temperature of 28.7 °c. calculate the final temperature of the resulting solution, given the following information: h+(aq) + oh- (aq) → h2o(ℓ) δhrxn = -56.2 kj/mol assume that volumes can be added, that the density of the solution is the same as that of water (1.00 g/ml), and the specific heat of the solution is the same as that for pure water, 4.184 j/(gk).

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.