Question

Please help me solve this urgently ( chemical engineering thermodynamics)

A. True or False; answ er False() orTrue(T). For those false, please give your explanation. (6%,4% each) 1. For a pure species of one mole of'a closed system, a reversible phase change wben two phases are in equilibrium, then TSS-ΔΗ Fig. 1 Fiz 2 2. In the figure, there is a cyclic process (the big circle!). for this cyclic process, it must be AS-O. (Fig D 3. If the work is not the maximum (ie, not reversible). then, it must turn into heat. 4. In Chapter 5, for the analysis of the process (see Fig. 2), we will come to the resalt of -W-- d then, we further apply thermodynamies second law, in order not to violate 2ed law. then, e cannot be directed into the system for the cycle. 's direstion must be constrained. Therefore. for this case, it violates thermodynamics Ist law For a cyclic process,as← 0. Therefore, the (isentropic) reversible, adiabatic process is always a cyelic process. 5. For a reversible and adiabatic process, it is i sentropic, t.e.as-o. 6. In Chapter 7, "Applications of Thermodynamies to Flow Processes" the assumptions include: adiabatsic steady-state, steady fnow, single inflused single effux, one-dimensional flow, incompressible fluid in the absence of shaft work and of changes in potential energy (ie, assumed Q. W,A: are all zeros) CHdr /T, then, we may find the values for the coeficients A. B. C, and Din the table of 8. For an ideal gas, ds the appendix for the Cr of the ideal gases, if the tempernture varies within the defined range of the table 9. If a reversible cycle is comprised of many Carnot cycles, then, this reversible cycle is also a Carnot one.

Answer 1

1. TRUE. when the system is in equilibrium during phase change . $\Delta G=0$ so we know that $\Delta G=\Delta H-T\Delta S$

when $\Delta G=0$ then $\Delta H=T\Delta S$

2. TRUE since entropy is a state function therefore if system is closed $\Delta S = 0$

3. TRUE if work is not maximum then the extra part of it must lost in the form of heat as per the principle of energy conservation

4. Chapter 5 data is missing