. A one mole block of ice, at 0C, will melt if it absorbs 6.01 kJ. H2O(s) --> H2O(l) ; H = + 6.01 kJ Graph an enthalpy diagram that shows these features:
1). Both axes labeled 2). Enthalpy of reactants 3). Enthalpy of products 4). Enthalpy change for the reaction

)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.