30% w/w aqueous hcl solution at 35°c is produced by absorbing hcl gas at 100m water at 25°c. the absorber works continuously at steady-state conditions. system property data are shown in tables q3(a) and q3(b) on pages 9 and 10. the heat capacity of the product solution is approximately 2.7 jg*°c-. the cooling water does not mix with the hcl solution. (a) cooling water is being used to maintain the temperature of the product stream. why is cooling needed? [1 mark] (b) calculate the material streams of the feed water and hcl required to produce 700 kg of the product per hour. show the results in kmol h [3 marks] (c) write the equation of the energy balance of the absorber in the general form. [2 marks] (d) calculate the specific enthalpies of the feed water, hci feed gas and the hci product solution. clearly state units. [5 marks] calculate how much heat must be removed from the absorber to produce 700 kg solution per hour. [9 marks] table q3(a): heat capacities of compounds compound formula state temp. a b x 102 cx 105 hydrogen chloride hci gas c 29.13 -0.134 0.9715 water h20 gas °c 33.46 0.688 0.7604 water h20 liquid k 18.296 47.12 -133.88 equations are in the form c =a+bt+ct? units for care j mor kor jmol c+ (see column temp.) table q3(b): heats of solution of hci (gas) in water at 25°c and 1 atm moles of water added to 1 mol hci heat of solution a j (mol hci-1 1 2 -26225 -48818 -56851 -61202 -64047 -68231 -69486