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A stream of 2 kmol / h of a mixture of acetonitrile ( A ) and toluene ( T ) , of mole fraction of

A stream of 2 kmol/h of a mixture of acetonitrile (A) and toluene (T), of mole fraction
of acetonitrile 0.25, is heated in a heat exchanger (Q) and then subjected to
a partial vaporization. The vapor (nV) and liquid (nL) compositions are
xV=0.401 and xL=0.096 in mole fractions of acetonitrile. The current nL coming out of the
vaporizer (T) is introduced into a distillation column (R) in order to obtain a
product nW with an xW =0.02. The nV current leaving the vaporization is condensed
completely in the exchanger C and already in liquid form joins the distillate nD from R
to give rise to a product stream P with an xPA=0.435. Calculate the value of the
distillate stream nD expressed in kmol/h leaving R.Un corrent de 2kmolh d'una mescla d'acetonitril (A) i tolu(T), de fracci molar
d'acetonitril 0,25,s escalfat en un bescanviador de calor (Q) i seguidament es sotmet a
una vaporitzaci parcial. Les composicions del vapor (nV) i del lquid (nL) sn
xV=0,401 i xL=0,096 en fraccions molars d'acetonitril. El corrent nL que surt del
vaporitzador (T) s'introdueix en una columna de destil*laci(R) per tal d'obtenir un
producte nW amb una xW=0,02. El corrent nV que surt de la vaporitzaci es condensa
totalment al bescanviador Ci ja en forma lquida s'uneix al destil* lat nD procedent de R
per donar lloc a un corrent de producte P amb una xPA=0,435. Calcula el valor del
corrent de destil* lat nD expressat en kmolh que surt de R.
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