Concept explainers
a)
The change in enthalpy
a)
Explanation of Solution
Given:
The initial temperature
The final temperature
Calculation:
Refer the table A-2, ”Ideal gas specific heats of various common gases table”,
Obtain the following constant values.
Write the mean change in enthalpy
Here, mean specific heat at constant volume function of temperature is
Substitute
Here, constant is a, b, c and d.
Integrate the Equation (II).
Substitute
Refer table A-1, “Molar mass properties table”,
The molar mass of nitrogen substance e
Write the change in enthalpy
Thus, the change in enthalpy
b)
The change in enthalpy
b)
Explanation of Solution
Refer the table A-2, ”Ideal gas specific heats of various common gases table”, obtain the specific heat at constant pressure of nitrogen gas at temperature of 800 K as
Write the change in enthalpy
Thus, the change in enthalpy
c)
The change in enthalpy
c)
Explanation of Solution
Refer the table A-2, ”Ideal gas specific heats of various common gases table”, obtain the specific heat at constant volume of nitrogen gas at temperature of 300 K as
Write the change in enthalpy
Thus, the change in enthalpy
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Chapter 5 Solutions
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