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InterviewSolution
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Which of the following hydrocarbons is used for the major industrual synthesis of acetylene?A. `CH_4`B. `C_2H_6`C. `C_2H_4`D. `CH_2` |
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Answer» Correct Answer - A `2CH_4overset(1500^@)toC_2H_2+3H_2` The reaction proceeds (although it is highly endothermic) because there are twice as many moles of products (4 mol) as reactants (2 mol). This cause a significant increase in entropy and at this high temperature, the `TDeltaS` term in the equation `DeltaG=DeltaH-TDeltaS` predominates, makin `DeltaG` negative even though `DeltaH` is positive. The optimum time for this reaction is a mere 0.01s because if kept too long at this temperature `C_2H_2` (an endothermic compound) would decompose. |
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