The industrial degreasing solvent methylene chloride,CH2Cl2, is prepared from methane by reaction with chlorine: CH4(g)+2Cl2(g)?CH2Cl2(g)+2HCl(g) Use...
The industrial degreasing solvent methylene chloride,CH2Cl2, is
prepared from methane by reaction with chlorine:
CH4(g)+2Cl2(g)?CH2Cl2(g)+2HCl(g)
Use the following data to calculate ? H? in kilojoules for the
reaction:
CH4(g)+Cl2(g)?CH3Cl(g)+HCl(g)?H?=?98.3kJCH3Cl(g)+Cl2(g)?CH2Cl2(g)+HCl(g)?H?=?104kJ
Express your answer using three significant figures.
Homework Answers
CH4(g)+Cl2(g)------------ > CH3Cl(g)+HCl(g) ?H?=?98.3kJ 1st equation
CH3Cl(g)+Cl2(g)------------>CH2Cl2(g)+HCl(g) ?H?=?104kJ 2nd equation
for reaction :
CH4(g)+2Cl2(g)------------> CH2Cl2(g)+2HCl(g) delta H = ??
1st equation + 2nd equation gives rise to
CH4(g)+2Cl2(g)------------>CH2Cl2(g)+2HCl(g) which we want
delta H of reacction = -98.3+(-104) = -202.3kJ/mol
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