\(\left\{{}\begin{matrix}C_2H_4:x\left(mol\right)\\C_2H_2:y\left(mol\right)\end{matrix}\right.\)⇒ x + y = \(\dfrac{6,72}{22,4}=0,3\left(1\right)\)
\(C_2H_4 + Br_2 \to C_2H_4Br_2\\ C_2H_2 + 2Br_2 \to C_2H_2Br_4\)
Theo PTHH :
x + 2y = \(\dfrac{64}{160} = 0,4(2)\)
Từ (1)(2) suy ra: x = 0,2 ; y = 0,1
Vậy :
\(\%V_{C_2H_4} = \dfrac{0,2}{0,3}.100\% = 66,67\%\\ \%V_{C_2H_2} = 100\% - 66,67\% = 33,33\%\)
\(n_{CO_2}=0.3\left(mol\right)\)
\(Đặt:n_{C_2H_2}=a\left(mol\right),n_{C_2H_4}=b\left(mol\right)\)
\(n_{Br_2}=\dfrac{64}{160}=0.4\left(mol\right)\)
\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
\(\left\{{}\begin{matrix}a+b=0.3\\2a+b=0.4\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}a=0.1\\b=0.2\end{matrix}\right.\)
\(\%V_{C_2H_2}=\dfrac{0.1}{0.3}\cdot100\%=33.33\%\)
\(\%V_{C_2H_4}=66.67\%\)