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13 Hydrogen burns exothermically in oxygen. The equation for the reaction is: 2H2 + O2 + 2H20 The table shows the bond energies involved. bond bond energy in kJ/mol H-H 436 O=0 498 0-H 464 What is the energy given out curing the reaction? A B c -3226 kJ/mol -884 kJ/mol 486 kJ/mol D -442 kJ/mol

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Q1
Bond energies of some bonds are given below:
Cl-Cl = 242.8 kJ mol1, H-Cl = 431.8 kJ mol1,
O-H = 464 kJ mol1, O=O = 442 kJ mol1
Using the B.E.s given, calculate ΔH for the given reaction: 2Cl2+2H2O4HCl+O2
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Q2
Calculate the enthalpy change for the reaction, H2+F22HF given that
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Q4
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Q5
From the following bond energies
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