Question

Calculeaza volumul solutiei alcoolice 72% p(densitatea) = 1,02 g/cm cub(3) , obtinut industrial din 67,2m cub(3) etena la 80atm si 350 grade celsius

Answer 1

poVo/TO=pV/T

1atmxVo/273=80x67,2/623

Vo=273x80x67,2/623

V0=2355,77m cubi

 

 

2355,77                     Y

CH2=CH2+ H2O→CH3-CH2-OH

22,4                          46

Y=2355,77X46/22,4

Y=4837,75 x1000KG ETANOL=4837750g-md

C=mdx100/ms

ms=mdx100/c=4837750x100/72

ms=6719086.062g

ρs=ms/Vs

V=ms/ρs

V=6719086.062g /1,02

V=5599238,385mL/1000=5599,238L/1000=5,59m cubi=5,6 m cubi

si alta metoda

pxV=nRT

80x67,2=nx0,082x623

n=80x67,2/0,082x623

n=105,23 Kmoli etena

 

105,23                       Y

CH2=CH2+ H2O→CH3-CH2-OH

1                               46

 

Y=46x105,23

Y=4840,58  Kg etanol-md

C=mdx100/ms

ms=4840,58x100/72

ms=6723,03 Kg solutie etanol

ρs=ms/Vs

Vs=ms/ρ

Unitatea de masura a densitatii este g/mL

6723,03Kgx1000=6723030 g

Vs=6723030/1,02

Vs=5602523,14mL/1000=5602,523L/1000=5.6 mcubi