a)
CH3-CH2-OH + Na ------->CH3-CH2-O-Na+ +1/2H2
2 moli alcool.... 1 mol H.....22,4L H
x moli alcool.....y moli H......448 L H
x= 2x448/22,4 = 448/11,2 = 40 moli alcool
Cv = v/V(L) => VCv = v => V = v/Cv = 40/2 = 20L solutie
b) 40/100x40= 16 moli H = 8moli H2
etilena + H2 ---------(Pb2+/Pd)-----> etena
1 mol H2..........1 mol etena
y moli H2...........x moli etena
y= 80x8/100 (din randament) = 6,4 moli = x