6.The number of particles crossing a unit area perpendicular to X-axis in unit time is given by
n = -D
2 1
2 1
x x
n n
−
−
where n1 and n2 are number of particles per unit volume for the values of x meant to x1 and x2.Find the
dimensions of the diffusion constant D.
Answers
Answer:
diacid moiety arises from the use of terephthalic acid or its esters. Copolyesters resulting from the use of mixtures of diols including 6-hexanediol. Isotropic coPEN 1 was prepared as follows: Batch reactor was prepared with 88.5 kg dimethyl 2,6-naphthalenedicarboxylate, 57.5 kg dimethyl terephthalate, 81 kg ethylene glycol, 4.7 kg 1,6-hexanediol, 239 g trimethylol propane, 22 g zinc (II) acetate, 15 g cobalt (II) acetate, and 51 g antimony (III) acetate. Under a pressure of 137 kPa (20 psig), the mixture was heated to 254 ° C. while removing the esterification byproduct methanol. After 39.6 kg of methanol was removed, 37 g of triethyl phosphonoacetate was charged to the reactor and then the pressure was gradually reduced to 131 N / m 2 (1 Torr) while heating to 290 ° C. Condensation reaction by-product ethylene glycol was continuously removed until a polymer with an inherent viscosity of 0.56 dl / g, as m
Answer:
answer is in the picture
