Interpretation:
The standard enthalpy change for the decomposition of water vapor to atoms in the gas phase, the
Concept Introduction:
Enthalpy of reaction:
The enthalpy of a reaction is calculated by subtracting the heat of formation of reactatns from heat of formation of products.
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
The enthalpy of reaction in gas phase is given by,
Answer to Problem 21.198QP
The standard enthalpy change for the decomposition of water vapor to atoms in the gas phase is
The
The standard enthalpy change for the decomposition of hydrogen peroxide vapor to atoms in the gas phase is
The
Explanation of Solution
Given data:
Water vapor decomposes to atoms in gas phase.
Hydrogen peroxide vapor decomposes to atoms in gas phase.
To Calculate: The standard enthalpy change for the decomposition of water vapor to atoms in the gas phase
The decomposition reaction of water vapor to atoms is written in chemical equation and the enthalpies of formation are written beneath the equation as follows,
The standard enthalpy change for the reaction is calculated as follows,
The standard enthalpy change for the decomposition reaction of water vapor to atoms is
To Calculate: The bond enthalpy of
The enthalpy for the above reaction in terms of bond energies is:
The bond enthalpy of
To Calculate: The standard enthalpy change for the decomposition of hydrogen peroxide vapor to atoms in the gas phase
The decomposition reaction of hydrogen peroxide vapor to atoms is written in chemical equation and the enthalpies of formation are written beneath the equation as follows,
The standard enthalpy change for the reaction is calculated as follows,
The standard enthalpy change for the decomposition reaction of water vapor to atoms is
To Calculate: The bond enthalpy of
The enthalpy for the above reaction in terms of bond energies is:
The bond enthalpy of
From the table 9.5, the bond energies are:
The standard enthalpy change for the decomposition of water vapor to atoms in the gas phase is calculated as
The
The standard enthalpy change for the decomposition of hydrogen peroxide vapor to atoms in the gas phase is calculated as
The
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Chapter 21 Solutions
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