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A single-effect evaporator is used to concentrate 60000 kg h-1 of a 40 wt % NaOH solution which is fed to the evaporator at 40°C. The concentrated liquid is a 55 wt % NaOH solution. Saturated steam at 3 atm is available for heating. The vapour space in the evaporator is at a pressure of 10 kPa. The overall heat transfer coefficient is 2000 W m-2 K-1 Determine:
a) the amount of vapour produced.
b) the area required for the evaporator. Include clearly values of relevant properties. c) the economy.
Time taken for an electron to complete one revolution in the Bohr orbit of hydrogen atom is: (1) 4 Π mr 2 / nh (2) nh/ 4Π 2 mr (3) nh/ 4Π 2 mr 2
Denaturation The structure of the natural proteins is accountable for their biological activity. These structures are arranged by numerous attractive forces among different par
Classification of polymers - Elastomers The polymers which have elastic character such as rubber (a material that can return to its unique shape after stretching is said to be
Q. Show Bond Lengths and p Π - d Π bonding? The bonds between S and 0 are much shorter than expected for a single bond in its oxides and therefore, may be considered as doubl
Q. Write short note on units of hardness and their relationship. Sol. Units of hardness and their relationship. (1) Parts Per million (ppm): It is defined as t
nomenclature of esters
why ionisation energy of Al is greater than Ga?
Ionic compounds do not have: (1) Hard and brittle nature (2) High melting and boiling point (3) Directional properties (4) Soluble in polar solvents Ans: Direction
Question Table 1 shows the specific rate of breakage S j and the values of the breakage distribution function b(i,j) of a mineral ore in a ball mill. Table 2 shows the size di
How to write conclusion for this topic hydrides
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