Chemistry

Chemistry

Problem

A reaction X→YX \rightarrow Y involves three steps. If - X→A;ΔH=−aX \rightarrow A; \Delta H = -a kcal ... (i) - B→A;ΔH=−bB \rightarrow A; \Delta H = -b kcal ... (ii) - B→Y;ΔH=−cB \rightarrow Y; \Delta H = -c kcal ... (iii) then ΔH\Delta H for X→YX \rightarrow Y is: a. a+b+ca + b + c b. b−a−cb - a - c c. a+b−ca + b - c d. c+b−ac + b - a

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