91影视

A chemical process can occur in the presence of different components. A mathematical representation of this process is known as chemical equation. A balanced chemical equation is one in which the number of atoms in all molecules is the same on both sides of the equation.

(a)

Looking at the picture given, assuming that green atoms-represent$\text{Cl}$, blue-H , and black-C , then initially the following molecules are present:${\text{Cl}}_{\text{2}}$, chlorine gas-depicted as a green molecule made of two$\text{Cl}$atoms, and${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}$, ethene-depicted as another molecule. Upon a reaction (1), the following conversion occurs to produce$\text{1,1 -}$dichloroethane 鈥�

${\text{Cl}}_{\text{2}}{\text{(g) +H}}_{\text{2}}{\text{C = CH}}_{\text{2}}\text{(g)}鈫�{\text{CH}}_{\text{2}}{\text{Cl - CH}}_{\text{2}}\text{Cl(g)}$

Then, upon rearrangement, the monomer of poly (vinyl chloride) is formed 鈥�

${\text{CH}}_{\text{2}}{\text{Cl - CH}}_{\text{2}}\text{Cl(g)}鈫�{\text{CH}}_{\text{2}}\text{- CHCl(g) + H - Cl(g)}$

(b)

The overall reaction can then be written as 鈥�

${\text{Cl}}_{\text{2}}\text{(g) + HC = CH(g)}鈫�{\text{CH}}_{\text{2}}\text{- CHCl(g) + H - Cl(g)}$

(c)

The reaction shown in step 1, is an electrophilic addition reaction as two species are combined to form one.

Therefore, the reaction is electrophilic addition reaction.

(d)

The reaction shown in step 2 , is an elimination reaction, as$\text{HCl}$is eliminated from${\text{CH}}_{\text{2}}{\text{Cl - CH}}_{\text{2}}\text{Cl}$ .

Therefore, the reaction is elimination reaction.

(e)

Based on the overall reaction, since there are 3 molecules of${\text{Cl}}_{\text{2}}$and${\text{CH}}_{\text{2}}{\text{= CH}}_{\text{2}}$initially, meaning that 鈥�

$n\left(C{l}_2\right)=n\left(C{H}_2=C{H}_2\right)=3脳0.15mol=0.45mol$

The amount of vinyl chloride (${\text{CH}}_{\text{2}}\text{- CHCl}$) produced is then 鈥�

$$\begin{gathered} n\left(CH{H}_2-CHCl\right)=0.45mol \\ m\left(C{H}_2-CHCl\right)=n路M_R \\ =0.45mol路62.50g/mol \\ m\left(C{H}_2-CHCl\right)=28.125g \end{gathered}$$

Therefore, the value for mass is obtained as $\text{28.125 g}$.