Q6 The table below contains some mean bond energy data: Bond H-HC-CNEN Mean bond energy /kJ mol-¹436 348 944 (i) Balance the equation below for the formation of one mole of ammonia, NH3, from its elements. N₁₂ + H₂ -38 kJmol-¹ (ii) Use the data in the table above to calculate the bond energy of N-H bond in NH3 in the reaction given in (i) above. Comment on why the value obtained is referred to as 'mean bond enthalpy' (Show working as this question will be assessed using grade descriptors 1, 3 & 7) Bond H-HC-HC-C Mean bond energy /kJ mol-¹436 418 348 (iii) Use the equation below and data from the table to calculate a value for the C=C bond energy in ethene. H H I I C C + H-HH-C-C-H AH = -136 kJ mol-¹ I I H H HH I ī Ethene NH3 DH = HH Ethane

Q6 The table below contains some mean bond energy data: Bond H-HC-CNEN Mean bond energy /kJ mol-¹436 348 944 (i) Balance the equation below for the formation of one mole of ammonia, NH3, from its elements. N₁₂ + H₂ -38 kJmol-¹ (ii) Use the data in the table above to calculate the bond energy of N-H bond in NH3 in the reaction given in (i) above. Comment on why the value obtained is referred to as 'mean bond enthalpy' (Show working as this question will be assessed using grade descriptors 1, 3 & 7) Bond H-HC-HC-C Mean bond energy /kJ mol-¹436 418 348 (iii) Use the equation below and data from the table to calculate a value for the C=C bond energy in ethene. H H I I C C + H-HH-C-C-H AH = -136 kJ mol-¹ I I H H HH I ī Ethene NH3 DH = HH Ethane

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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