Solution Found!
Using Entropy Data and ConceptsAnswer the following true
Chapter 6, Problem 18P(choose chapter or problem)
Answer the following true or false. Explain.
(a) The change of entropy of a closed system is the same for every process between two specified states.
(b) The entropy of a fixed amount of an ideal gas increases in every isothermal compression.
(c) The specific internal energy and enthalpy of an ideal gas are each functions of temperature alone but its specific entropy depends on two independent intensive properties.
(d) One of the T ds equations has the form T ds = du - p dy.
(e) The entropy of a fixed amount of an incompressible substance increases in every process in which temperature decreases.
Questions & Answers
QUESTION:
Answer the following true or false. Explain.
(a) The change of entropy of a closed system is the same for every process between two specified states.
(b) The entropy of a fixed amount of an ideal gas increases in every isothermal compression.
(c) The specific internal energy and enthalpy of an ideal gas are each functions of temperature alone but its specific entropy depends on two independent intensive properties.
(d) One of the T ds equations has the form T ds = du - p dy.
(e) The entropy of a fixed amount of an incompressible substance increases in every process in which temperature decreases.
ANSWER:Solution 18P:
a)
This is true.
The entropy is just a number and independent of the process (for a closed system).
b)
This is true.
As the entropy almost always increases. Except the adiabatic process, the entropy increases in all other processes.
c)
This is false.
Internal energy is a function of temperature so as the specific internal energy.
Enthalpy is : , which tells that it is a function of temperature, internal energy, pressure and volume, so as the specific enthalpy.