Amixture of mole fraction 0.500 ethanol and 0.500 water at 25°c is fed continuously to a vessel at a rate of 500 kg/hr. the liquid is partially vaporized to a vapor with mole composition of 0.832 ethanol, with the remaining liquid 0.127 ethanol. both the liquid and vapor exiting streams have a temperature of 71 °c. (a) draw pfd for the process. (b) write the appropriate energy balance, with cancelled terms. (c) how much heat must be transferred to the mixture?

it is the most commonly accepted one

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.