Ahot toluene stream, which has mass flow rate of 8.0 kg/min, is cooled by cooling water in a cocurrent heat exchanger; its temperature drops from 90o c to 60o c after passing through the heat exchanger. the cooling water stream has a mass flow rate of 10 kg/min and an inlet temperature of 20o c. given that the specific heats of toluene and water are 0.41 and 1.00 kcal/(kg. o c), respectively, determine (a, 3%) the heat duty of the heat exchanger, (b,3%) the temperature of the cooling water leaving the heat exchanger, (c, 3%) the log mean temperature difference (or "driving force") for the heat exchange process, and (d, 3%) the ua value of the heat exchanger. assume a negligible heat loss to the surroundings.

Complete Question  

The complete question is shown on the first question

a) The duty of the heat exchanger is given as 6.8658 KJ /sec

b) The temperature of the water leaving the exchanger is TOUT = 29.84 ⁰C

c) The log mean difference is given as TZ = 47.317 ⁰ C

d) the UA value is UA = 145.10

Explanation:

The explanation is uploaded on the first and second ,third and fourth image

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.

elements make up everything, and they combine to make compounds.

the answer is c