\(GS:\)
\(n_{SO_2}=n_{O_2}=1\left(mol\right)\)
\(n_{O_2\left(pư\right)}=a\left(mol\right)\)
\(2SO_2+O_2\underrightarrow{^{V_2O_5,t^0}}2SO_3\)
\(Bđ:\) \(1...........1\)
\(Pư:\) \(2a......a.........2a\)
\(Kt:\) \(1-2a...1-a......2a\)
\(n_{khí}=1-2a+1-a+2a=2-a\)
\(\%SO_3=\dfrac{2a}{2-a}\cdot100\%=35.3\%\)
\(\Leftrightarrow a=0.3\)
=> Hiệu suất tính theo SO2
\(H\%=\dfrac{0.3\cdot2}{1}\cdot100\%=60\%\)