Interpretation:
The total enthalpy and entropy of a liquid-vapor equilibrium mixture at a pressure of 8000 kPa should be deduced.
Concept Introduction:
- For a two-phase liquid-vapor equilibrium mixture the enthalpy (H) and entropy (S) are given as:
Total Enthalpy, H =
Total Entropy, S =
Given:
Total volume, Vt = 0.15 m3
Equilibrium pressure = 8000 kPa
Explanation:
Based on the steam tables at pressure = 8000 kPa we have:
Specific volume of liquid, vf = 0.001384 m3/kg
Specific volume of vapor, vg = 0.023525 m3/kg
Specific enthalpy of liquid, Hf = 1317.1 kJ/kg
Specific enthalpy of vapor, Hg = 2758.7 kJ/kg
Specific entropy of liquid, Sf = 3.2077 kJ/kg-K
Specific entropy of liquid, Sg = 5.7450 kJ/kg-K
Calculation:
Step 1:
Calculate the steam quality x using equation (3)
It is given that in the volumes of the liquid and vapor in the mixture are equal i.e. the total volume is:-
Step 2:
Calculate H and S based on equations 1 and 2
Thus the total enthalpy and entropy values are:
Total Enthalpy, H =
Total Entropy, S =
Want to see the full answer?
Check out a sample textbook solutionChapter 6 Solutions
INTRO.TO CHEM.ENGR.THERMO.-EBOOK>I<
- Introduction to Chemical Engineering Thermodynami...Chemical EngineeringISBN:9781259696527Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark SwihartPublisher:McGraw-Hill EducationElementary Principles of Chemical Processes, Bind...Chemical EngineeringISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEYElements of Chemical Reaction Engineering (5th Ed...Chemical EngineeringISBN:9780133887518Author:H. Scott FoglerPublisher:Prentice Hall
- Industrial Plastics: Theory and ApplicationsChemical EngineeringISBN:9781285061238Author:Lokensgard, ErikPublisher:Delmar Cengage LearningUnit Operations of Chemical EngineeringChemical EngineeringISBN:9780072848236Author:Warren McCabe, Julian C. Smith, Peter HarriottPublisher:McGraw-Hill Companies, The