A hot toluene stream, which has mass flow rate of 8.0 kg/min, is cooled by cooling water in a cocurrent heat exchanger; its temp
erature 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.
1 answer:
Complete Question
The complete question is shown on the first question
Answer:
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
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Given :
Compared with a mole of oxygen-16, a mole of sulfur-32 contains:
A. twice as many atoms .
B. half as many atoms .
C. an equal number of atoms .
D. 8 times as many atoms .
To Find :
The correct option .
Solution :
One mole of atoms of oxygen-16 has a mass of 16 g, as 16 is the atomic weight of oxygen, and contains atoms of oxygen.
Same, one mole of sulfur-32 has 32 g mass , and contains same atoms of sulfur .
So , both have equal number of atoms .
Therefore , option C. is correct .
Hence , this is the required solution .