Aqueous sulfuric solutions containing 15.0 wt% H2SO4 and 80.0 wt% H2SO4 are mixed to form a 30.0 wt% product solution. The 15 % solution was in a lab in which the temperature was 77 F. The 80% solution had just been taken from a storage cabinet in an air-conditioned stockroom and was at a temperature of 60 F when the mixing occurred.
a. The mass of the 15% solution is 2.3 Lbm. What mass of the 80% solution should be weighed out?
b. A figure is provided in the attached file to assist you with this question. Estimate the product solution temperature if the mixing is adiabatic.
c. The product solution temperature eventually drops to 77 F. How much heat (Btu) is transferred from the solution to the lab air in this constant-pressure cooling process?
d. The dilution can be carried out either by slowly adding the 15% solution to the 80% solution or vice versa. Use the fsame figure provided to determine the maximum temperature that would be attained using each procedure. Which procedure would be safer?
