Vr= Dr*Vhhr/100= 92*112.5/100=103.5ml
mr=Vr*Dr= 103.5*0.8=82.8g
nC2H5OH= 82.8/46=1.8 mol
VH2O= Vhhr-Vr= 112.5-103.5=9ml
mH2O=VH2O*DH2O= 9*1=9g
nH2O= 9/18= 0.5 mol
C2H5OH + Na --> C2H5ONa + 1/2H2
1.8_________________________0.9
H2O + Na --> NaOH + 1/2H2
0.5___________________0.25
nH2= 0.9+0.25=1.15mol
VH2= 1.15*22.4=25.76l