n Br2=\(\dfrac{32}{160}\)=0,2 mol

C2H2+2Br2->C2H2Br4

0,1------0,2 mol

=>%VC2H2=\(\dfrac{0,1.22,4}{5,6}\).100=40%

=>%VCH4=100-40=60%

=>n CH4=\(\dfrac{5,6-0,1.22,4}{22,4}\)=0,15 mol

CH4+2O2-to>CO2+2H2O

0,15----0,3

C2H2+\(\dfrac{5}{2}\)O2-to>2CO2+H2O

0,1-----0,25 mol

=>VO2=(0,3+0,25).22,4=12,32l

a) PTHH: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

b) Ta có: \(n_{Br_2}=\dfrac{11,2}{160}=0,07\left(mol\right)=n_{C_2H_4}\)

\(\Rightarrow\%V_{C_2H_4}=\dfrac{0,07\cdot22,4}{1,72}\cdot100\%\approx91,16\%\) 

\(\Rightarrow\%V_{CH_4}=8,84\%\)

a) \(C_2H_4 + Br_2 \to C_2H_4Br_2\)

b)

\(n_{C_2H_4} = n_{Br_2} = \dfrac{5,6}{160} = 0,035(mol)\\ \%V_{C_2H_4} = \dfrac{0,035.22,4}{0,86}.100\% = 91,16\%\\ \%V_{CH_4} = 100\% - 91,16\% = 8,84\%\)

a, \(n_{C_2H_4}+n_{C_2H_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\left(1\right)\)

PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

Theo PT: \(n_{Br_2}=n_{C_2H_4}+2n_{C_2H_2}=\dfrac{72}{160}=0,45\left(mol\right)\left(2\right)\)

Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}n_{C_2H_4}=0,15\left(mol\right)\\n_{C_2H_2}=0,15\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}\%m_{C_2H_4}=\dfrac{0,15.28}{0,15.28+0,15.26}.100\%\approx51,85\%\\\%m_{C_2H_2}\approx48,15\%\end{matrix}\right.\)

\(\%V_{C_2H_4}=\%V_{C_2H_2}=\dfrac{0,15.22,4}{6,72}.100\%=50\%\)

b, Theo PT: \(\left\{{}\begin{matrix}n_{C_2H_4Br_2}=n_{C_2H_4}=0,15\left(mol\right)\\n_{C_2H_2Br_4}=n_{C_2H_2}=0,15\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}m_{C_2H_4Br_2}=0,15.188=28,2\left(g\right)\\m_{C_2H_2Br_4}=0,15.346=51,9\left(g\right)\end{matrix}\right.\)

Ta có: \(n_{C_2H_2Br_2}=\dfrac{173}{186}\left(mol\right)\)

PT: \(C_2H_2+Br_2\rightarrow C_2H_2Br_2\)

Theo PT: \(n_{C_2H_2}=n_{C_2H_2Br_2}=\dfrac{173}{186}\left(mol\right)\)

\(\Rightarrow V_{C_2H_2}=\dfrac{173}{186}.22,4=20,83\left(l\right)\) > V_hh → vô lý

Bạn xem lại đề nhé.

a, \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

b, \(n_{Br_2}=\dfrac{16}{160}=0,1\left(mol\right)\)

\(n_{C_2H_4}=n_{Br_2}=0,1\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,1.22,4}{3,36}.100\%\approx66,67\%\\\%V_{CH_4}\approx33,33\%\end{matrix}\right.\)

a) 

\(n_{Br_2}=\dfrac{8}{160}=0,05\left(mol\right)\)

PTHH: C₂H₄ + Br₂ --> C₂H₄Br₂

             0,05<-0,05

=> \(n_{CH_4}=\dfrac{3,36}{22,4}-0,05=0,1\left(mol\right)\)

\(\%m_{CH_4}=\dfrac{0,1.16}{0,1.16+0,05.28}.100\%=53,33\%\)

\(\%m_{C_2H_4}=\dfrac{0,05.28}{0,1.16+0,05.28}.100\%=46,67\%\)

b)

PTHH: CH₄ + 2O₂ --t^o--> CO₂ + 2H₂O

            0,1-->0,2

            C₂H₄ + 3O₂ --t^o--> 2CO₂ + 2H₂O

           0,05--->0,15

=> \(V_{O_2}=\left(0,2+0,15\right).22,4=7,84\left(l\right)\)