What is the product of a halogenation reaction with methane?
What is the product of a halogenation reaction with methane?
Halogenation often does not stop at monosubstitution. Depending on reaction conditions, the chlorination of methane yields dichloromethane, chloroform and carbon tetrachloride. In most hydrocarbons, more than one possible product exists depending on which hydrogen is replaced.
What is the mechanism of halogenation of methane?
The mechanism of halogenations occurs in three steps: chain initiation, chain propagation, and chain termination. Complete step by step answer: When alkane is treated with a suitable halogen in the presence of ultraviolet light or by heating the reaction mixture to 520-670 K, haloalkane is produced.
How does methane react with chlorine?
If a mixture of methane and chlorine is exposed to a flame, it explodes – producing carbon and hydrogen chloride. The reaction we are going to explore is a more gentle one between methane and chlorine in the presence of ultraviolet light – typically sunlight. …
What happens when an alkane reacts with chlorine?
In the presence of light, or at high temperatures, alkanes react with halogens to form alkyl halides. Reaction with chlorine gives an alkyl chloride.
Is the reaction between methane and chlorine endothermic?
If more energy is put into a reaction than is given off, the ΔH is positive, the reaction is endothermic and not energetically favorable. Since, the ΔH for the chlorination of methane is negative, the reaction is exothermic.
When methane is chlorinated Among the products found are traces of chloroethane how is it formed?
3) Termination: Thus, ethane is formed during the formation of chloromethane by chlorination of methane because two methyl free radicals may combine during chlorination to give ethane.
What is the major product of chlorination of methane?
Thus the final product of chlorination of methane in the sunlight is carbon tetrachloride, i.e. option D is the correct answer. Note: The chlorination of methane also takes place in thermal conditions. If the amount of chlorine is limited then the major product is methyl chloride i.e. \[C{H_3}Cl\].
What happens when methane reacts with chlorine give the equation of the reaction which takes place?
(a) Methane reacts with chlorine in the presence of sunlight to form chloromethane and hydrogen chloride….1 Answer.
| Soaps | Detergents |
|---|---|
| (i) Soaps are biodegradable. (ii) Soaps have relatively weak cleansing action. | (i) Detergents are not biodegradable. (ii) Detergents have a strong cleansing action. |
What is the source of energy used to react chlorine with methane?
Chlorine will combine spontaneously with methane. The energy required to start a reaction is called the activation energy. What is the source of energy used to react chlorine with methane? Freon is a halide hydrocarbon.
Which of the following is the major product of the chlorination of methane if a large excess of methane is used?
methyl chloride
In the case of methane, a large excess of the hydrocarbon favors formation of methyl chloride as the chief product; whereas, an excess of chlorine favors formation of chloroform and carbon tetrachloride.
What type of reaction occurs between alkanes and chlorine in the presence of light?
Alkanes undergo a substitution reaction with halogens in the presence of light. For instance, in ultraviolet light , methane reacts with halogen molecules such as chlorine and bromine. This reaction is a substitution reaction because one of the hydrogen atoms from the methane is replaced by a bromine atom.
How do you make chlorinated methanes with halogens?
For the industrial production of chlorinated methanes, free-radical halogenation is used. Unsaturated compounds, and in particular alkenes and alkynes, add halogens: Halogen addition to alkenes is achieved through intermediate halonium ions.
What is the reaction between methane and chlorine?
The reaction between methane and chlorine is easily controllable, while bromine is even less reactive than chlorine. Iodine, on the other hand, does not react with methane.
What is the reaction entropy of methane halogenation?
The reaction entropy of methane halogenation is approximately zero, because in the reaction two molecules of gaseous starting products are converted into two molecules of gaseous products. Chlorine is the most reactive halogen. Without any special precautions, a mixture of methane and chlorine at standard pressure explodes.
Why is bromine less reactive in methane halogenation than chlorine?
In the halogenation of methane, bromine is much less reactive than chlorine, although the bromination is an exothermic reaction whose reaction enthalpy amounts to -30 kJ/mol. Therefore, even at 300 °C the chain propagation proceeds just slowly. Bromine is much less reactive in methane halogenation than chlorine is.
