Question

La trecerea unui amestec de etena:acetilena:hidrogen in raport molar de 2:1:5 peste un catalizator de Ni, la temperatura si presiune ridicata . Va avea loc o reducere a volumului cu un procent de.........%? Multumesc!

Answer 1

2                Y           Z

CH2=CH2+H2→CH3-CH3

1                  1          1

 

1              T           W

CH≡CH+2H2→CH3-CH3

     1         2             1

 

Initial moli amestec=2+1+5=8 moli

Y=2 moli de H2 –consumati in reactia 1

Z=2 moli de etan formati in reactia 1

T=2 moli H2 consumati in reactia 2

W=1 mol format in reactia 2

Dupa reactie amestecul contine:5-4=1 mol H2 neconsumat

Z+w=3 moli de etan format

Amestecul final=1+3=4 moli

n=V/Vm

V=nxVm

Vinitial=8x22,4=179,2 L

Vfinal=4x22,4=89,6L

179,6………………………89,6

100………………………….a

a=89,6x100/179,2

a=50%