Print d calculator Periodic Table Question 24 of 25 Map sapling earning Alkane h

Question

Print d calculator Periodic Table Question 24 of 25 Map sapling earning Alkane halogenation is a two-step reaction, as shown below. Using the table of bond dissociation energies, calculate the enthalpy of each step and the enthalpy of the overall reaction Step 1: Number CH CH kJ mol AH HCI CH CH CH CH Step 2 Number CH CH AH kJ mol CI CH CH CH CH Overall reaction: CH CH Number AH kJ mol HC CH CH CH CH Bond Dissociation Energies for A-B A. B) Bond broken ANH, kJ/mold Bond broken ANH, kJ/mol Bond broken WH, kJ/mol AO Previous 3 Give Up & View Solution Check Answer e Next E Exit Hint

Explanation / Answer

delta H = bond broken - bond formed

Step 1

delta H = (C-H) - (H-Cl) = 410 - 432 = -22 KJ/mol

Step 2

delta H = Cl-Cl - (C-Cl) = 243 - 330 = -87 KJ/mol

Adding the two steps we get the final delta H = -22-87 = -109 KJ/mol

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