Concept explainers
(i)
Interpretation: The values of
Concept introduction: Enthalpy is the internal heat content of the system. Under constant pressure, a system can do expansion work under the effect of energy supplied as heat known as enthalpy change of the system. Therefore, the measure of amount of heat supplied to the system gives the enthalpy change of the system. The total amount of energy possessed within the given system is known as internal energy of the system. It is denoted by
(i)

Answer to Problem 2C.5BE
The value of
Explanation of Solution
The given reactions are:
The given value of
To calculate the
The value of
Add reaction (4) to reaction (2).
To calculate the
Hence, the value of
The change in number of moles of the reaction (3) is calculated by the formula,
Hence, the number of moles for the reaction (3) is,
The expression to calculate the value of
Substitute the values of
Hence, the value of
(ii)
Interpretation: The value of
Concept introduction: Enthalpy is the internal heat content of the system. Under constant pressure, a system can do expansion work under the effect of energy supplied as heat known as enthalpy change of the system. Therefore, the measure of amount of heat supplied to the system gives the enthalpy change of the system. The total amount of energy possessed within the given system is known as internal energy of the system. It is denoted by
(ii)

Answer to Problem 2C.5BE
The value of
Explanation of Solution
The given reactions are:
The given value of
The value of
The value of
From the above expression, the value of
Hence, the value of
The value of
The value of
From the above expression, the value of
Hence, the value of
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Chapter 2 Solutions
ATKINS' PHYSICAL CHEMISTRY
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