write the equations for the substitution reaction of methene with bromine under the following conditions.
a) reaction in the presence of sunlight
CH4+Br2 sunlight=?
b) reaction in the absence of sunlight
CH4+Br2 =?
Reaction with the presence of sunlight would be: CH4 + Br2 --> CH3Br + HBr
A) CH4 +Br2 sunlight-> CH3Br + Br
b) no reaction in the dark
a) The reaction of methane (CH4) with bromine (Br2) in the presence of sunlight is a substitution reaction. Sunlight is used as a source of energy to initiate the reaction. In this case, the substitution reaction involves one hydrogen atom from methane being replaced by a bromine atom. The equation for this reaction is:
CH4 + Br2 (sunlight) → CH3Br + HBr
b) The reaction of methane (CH4) with bromine (Br2) in the absence of sunlight is also a substitution reaction. However, in the absence of sunlight, an alternative source of energy must be used to initiate the reaction. Since no energy source is specified in the question, it can be assumed that no reaction occurs. Thus, the balanced equation remains:
CH4 + Br2 → No reaction