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The decomposition of dinitrogen pentaoxide has an activation energy of 102 kJ/mol and AH°ran =+ 55 kJ/mol. What is the activation energy for the reverse reaction? 27 kJ/mol 47 kJ/mol 55 kJ/mol A. В. С. D. 102 kJ/mol E. More information is needed, since this is a Hess' Law calculation.

The decomposition of dinitrogen pentaoxide has an activation energy of 102 kJ/mol and AH°ran =+ 55 kJ/mol. What is the activation energy for the reverse reaction? 27 kJ/mol 47 kJ/mol 55 kJ/mol A. В. С. D. 102 kJ/mol E. More information is needed, since this is a Hess' Law calculation.

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Chapter12: Chemical Kinetics
Section: Chapter Questions
Problem 82E: The decomposition of NH3 to N2 and H2 was studied on two surfaces: Surface Ea (kJ/mol) W 163 Os 197...
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41. The decomposition of dinitrogen pentaoxide has an activation energy of 102 kJ/mol and AH°rxn=+ 55 kJ/mol. What is the activation energy for the reverse reaction? A. В. С. 27 kJ/mol 47 kJ/mol 55 kJ/mol 102 kJ/mol More information is needed, since this is a Hess' Law calculation. D. Е. 42. The kinetics of the decomposition of dinitrogen pentaoxide is studied at 50°C and at 75°C. Which of the following statements concerning the studies is correct? The rate at 75°C will be greater than the rate at 50°C because the activation energy will be lower at 75°C than at 50°C. А. В. The rate at 75°C will be greater than the rate at 50°C because the activation energy will be higher at 75°C than at 50°C. The rate at 75°C will be less than the rate at 50°C because the molecules at higher speeds do not interact as well as those at lower speeds. The rate at 75°C will be greater than at 50°C because the concentration of a gas increases with increasing temperature. The rate at 75°C will be greater than the rate at 50°C because the number of molecules with enough energy to react increases with increasing temperature. С. D. Е. 43. Reaction intermediates differ from activated complexes in that А. they are stable molecules with normal bonds and are frequently isolated. В. they are molecules with normal bonds rather than partial bonds and can occasionally be isolated. С. they are intermediate structures which have characteristics of both reactants and products. they are unstable and can never be isolated. all reactions involve reaction intermediates, but not all have activated complexes. D. Е.
Transcribed Image Text:41. The decomposition of dinitrogen pentaoxide has an activation energy of 102 kJ/mol and AH°rxn=+ 55 kJ/mol. What is the activation energy for the reverse reaction? A. В. С. 27 kJ/mol 47 kJ/mol 55 kJ/mol 102 kJ/mol More information is needed, since this is a Hess' Law calculation. D. Е. 42. The kinetics of the decomposition of dinitrogen pentaoxide is studied at 50°C and at 75°C. Which of the following statements concerning the studies is correct? The rate at 75°C will be greater than the rate at 50°C because the activation energy will be lower at 75°C than at 50°C. А. В. The rate at 75°C will be greater than the rate at 50°C because the activation energy will be higher at 75°C than at 50°C. The rate at 75°C will be less than the rate at 50°C because the molecules at higher speeds do not interact as well as those at lower speeds. The rate at 75°C will be greater than at 50°C because the concentration of a gas increases with increasing temperature. The rate at 75°C will be greater than the rate at 50°C because the number of molecules with enough energy to react increases with increasing temperature. С. D. Е. 43. Reaction intermediates differ from activated complexes in that А. they are stable molecules with normal bonds and are frequently isolated. В. they are molecules with normal bonds rather than partial bonds and can occasionally be isolated. С. they are intermediate structures which have characteristics of both reactants and products. they are unstable and can never be isolated. all reactions involve reaction intermediates, but not all have activated complexes. D. Е.
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