The bond enthalpy N-H has to be calculated using Pauling formula. Concept introduction: Bond enthalpy: The measure of stability of molecule is bond enthalpy. The change in enthalpy is related in breaking a specific bond of 1 mole of gaseous molecule. In solids and liquids bond enthalpies are affected by neighboring molecules. There is possibility to predict the enthalpy of reaction using the average bond enthalpies. Energy is always needed for the breaking of chemical bonds and release of energy always takes place with the formation of chemical bonds. The enthalpy of reaction is estimated by counting the total number of broken bonds and bonds formed in a reaction. The enthalpy of reaction in gas phase is given by, ΔH ° = ∑ BE (reactants) - ∑ BE (products)
The bond enthalpy N-H has to be calculated using Pauling formula. Concept introduction: Bond enthalpy: The measure of stability of molecule is bond enthalpy. The change in enthalpy is related in breaking a specific bond of 1 mole of gaseous molecule. In solids and liquids bond enthalpies are affected by neighboring molecules. There is possibility to predict the enthalpy of reaction using the average bond enthalpies. Energy is always needed for the breaking of chemical bonds and release of energy always takes place with the formation of chemical bonds. The enthalpy of reaction is estimated by counting the total number of broken bonds and bonds formed in a reaction. The enthalpy of reaction in gas phase is given by, ΔH ° = ∑ BE (reactants) - ∑ BE (products)
Solution Summary: The author explains that bond enthalpy is the measure of stability of a molecule. In solids and liquids, it is affected by neighboring molecules.
Definition Definition Connection between particles in a compound. Chemical bonds are the forces that hold the particles of a compound together. The stability of a chemical compound greatly depends on the nature and strength of the chemical bonding present in it. As the strength of the chemical bonding increases the stability of the compound also increases.
Chapter 9, Problem 9.148QP
Interpretation Introduction
Interpretation:
The bond enthalpy N-H has to be calculated using Pauling formula.
Concept introduction:
Bond enthalpy:
The measure of stability of molecule is bond enthalpy. The change in enthalpy is related in breaking a specific bond of 1 mole of gaseous molecule. In solids and liquids bond enthalpies are affected by neighboring molecules. There is possibility to predict the enthalpy of reaction using the average bond enthalpies. Energy is always needed for the breaking of chemical bonds and release of energy always takes place with the formation of chemical bonds. The enthalpy of reaction is estimated by counting the total number of broken bonds and bonds formed in a reaction.
The enthalpy of reaction in gas phase is given by,
Describe a sequence of photophysical processes that can be followed by radiation adsorbed by a molecule in the ground state to give rise to phosphorescent emission.
State two similarities between fluorescence and phosphorescence.
State three photophysical processes that can be related to the effects of incident radiation on a molecule in its ground state. Consider that radiation can give rise to fluorescent emission, but not phosphorescent emission.
Chapter 9 Solutions
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