Section 1
Exercises: Things Engineers Think About
What is an advantage of using the Redlich-Kwong equation of state in the generalized form given by Eq. $11.9$ instead of Eq. 11.7? A disadvantage?
To determine the specific volume of superheated water vapor at a known pressure and temperature, when would you use each of the following: the steam tables, the generalized compressibility chart, an equation of state, the ideal gas model?
If the function $p=p(T, v)$ is an equation of state, is $(\partial p l \partial T)_{0}$ a property? What are the independent variables of $(\partial p / \partial T)_{v} ?$
In the expression $(\partial w / \partial T)_{n}$, what does the subscript $v$ signify?
Explain how a Mollier diagram provides a graphical representation of the fundamental function $h(s, p)$.
How is the Clapeyron equation used?
For a gas whose equation of state is $p \bar{u}=\bar{R} T$, are the specific heats $\bar{c}_{p}$ and $\bar{c}_{e}$ necessarily functions of temperature alone?
Referring to the $p$-T diagram for water, explain why ice melts under the blade of an ice skate.
Can you devise a way to determine the specific heat $\bar{c}_{p}$ of a gas by direct measurement? Indirectly, using other measured data?
For an ideal gas, what is the value of the Joule-Thomson coefficient?
- At what states is the entropy departure negligible? The fugacity coefficient, fip, closely equal to unity?
In Eq. 11.107, what do the subscripts $T, p$, and $n_{l}$ signify? What does $i$ denote?
How does Eq. $11.108$ reduce for a system consisting of a pure substance? Repeat for an ideal gas mixture.
If two different liquids of known volumes are mixed, is the tinal volume necessarily equal to the sum of the original volumes?
For a binary solution at temperature $T$ and pressure $p$, how would you determine the specific heat $\bar{c}_{p} ?$ Repeat for an ideal solution and for an ideal gas mixture.