Water is added to pure sulfuric acid in a well-insulated flask initially at 25°C and 1 atm to produce a 4.00-molar sulfuric acid solution (SG = 1.23 1). The final temperature of the product solution is to be 25°C, so that the water added must be chilled liquid (T < 25°C), or a mixture of liquid water and ice. Take as a basis of calculation one liter of the product solution and assume Q = ΔH for the process. If you need to know the heat capacity of ice, take it to be half that of liquid water.

(a) If only liquid water is added, what masses (g) of H2SO4 and H2O should be mixed and what should be the initial temperature of the water?

(b) If a mixture of liquid water and ice is added, how many grams of each should be fed?