FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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A PV diagram below, Figure 1, shows two possible states of a system
containing three moles of a monatomic ideal gas. (P,= P2 = 450 Pa,
V, = 2m', V,= 8m²)
c. Draw the process which depicts an isothermal expansion from
state 1 to the volume V, followed by an isochoric increase in
temperature to state 2 and label this process (B).
d. Find the change in internal energy of the gas for the two-step
process (B)
Figure 1
(N/m²)
500
!
400+
300+
200+
100 -
+
+
+
+
4
6.
8
10 V (m³)
2
Copyright © 2005 Pearson Prentice Hall, Inc.
1. Complete the following table. Show the states on the T-v diagram
Substance
T°C
P, KPa
Internal Energy.
Enthalpy,
Specific volume,
Quality, X
Phase description
u, kj/kg
h, kj/kg
v, m'/kg
Pg 98 pa
H,0
200
10000
H,O
600
2000
R-134a
900
180
4.1 A rigid vessel contains 0.014 m3 of saturated – vapor steam in equilibrium with
0.021 m3 of saturated liquid water at 100°C. Heat is transferred to the vessel until
one phase just disappears, and a single phase remains. Which phase (liquid or
vapor) remains and what are its temperature and pressure? How much heat is
transferred in the process?
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- Paragraph 4: For H2O, find the following properties using the given information: Find P and x for T 140°C and h 1800 kJ/kg. %3D A. P-361.3kPa X-56 % B. P-617.8KP. X-54% C. P-101.3kPa X-49.8 % D. P-361.3kPa X-51% Paragraph 5: For H2O, find the following properties using the given information:arrow_forward2. Given a closed container of volume 1 L containing 50 g of helium gas, calculate the following: a. The pressure at T = 6 K, assuming that the gas is an ideal gas. b. The pressure at T of state. = 6 K, assuming that the gas obeys van der Waal's equation c. The pressure at T 6 K, assuming that the gas obeys the virial equation of state truncated after the second term. = d. The state of the fluid at T = 4.2 K. (Hint: 4.2 K is below T. and 50 kg/m³ is greater than p, @ 4.2 K.)arrow_forward3. Find the internal energy of water at the given states for 6 MPa and determine: T,°C U, KJ/Kg Phase Description saturated vapor State 1 State 2 saturated liquid saturated liquid saturated vapor state 3 + 0.95 state 4 500°C state 5 100°C state 6 T= 460°C a- The internal energy b-and the phase descriptions in the following table for water.arrow_forward
- include explanation plzz..,arrow_forwardHW1- Complete the following table for H₂O. Write the details of the solution and show each state on a Tv diagram State T, °C 2 3 5 140 125 500 P, kPa 550 750 500 v, m³/kg 0.05 0.140 h, kJ/kg phase description 2890 Saturated liquidarrow_forwardProblem 1 For H2O, determine the specified property (i.e., SLVM, SHV, CL) of the following states. Locate the state on a sketch of a T-v and p-v diagram. a) T = 150 °C, v = 0.35 m³/kg. Find psat in bar. b) p = 25 MPa, T = 100 °C. Find v in m³/kg.arrow_forward
- 3.6 WP For H,0, determine the specified property at the indicated state. a. T = 140°C, v = 0.5 m³/kg. Find p, in bar b. p = 30 MPa, T = 100°C. Find v, in m³/kg. c. p = 10 MPa, T = 485°C. Find v, in m³/kg. d. T = 80°C, x = 0.75. Find p, in bar, and v, in m³/kg.arrow_forwardDetermine the state of water if P= 25 bar and T= 150 C. Select one: O a. Superheated Vapor O b. Mixture O c. Compressed liquidarrow_forwardAn ideal gas contained in a piston-and-cylinder device undergoes a thermodynamic cycle made up of three quasi-equilibrium processes. Step 1-2: Adiabatic compression from 330 K and 9.35 atm to 12.58 atm Step 2-3: Isobaric cooling Step 3-1: Isothermal expansion c.) Calculate Q, W, ΔU and ΔH, in J/mole, for each step in the process and for the entire cycle. Assume that CP = (5/2) R. d.) Is this cycle a power cycle or a refrigeration cycle? Explain. Calculate the thermal efficiency or COP of the cycle, whichever is appropriate.arrow_forward
- 2.00-mol of a monatomic ideal gas goes from State A to State D via the path A→B→C→D: State A PA=10.5atm, VA=11.00L State B PB=10.5atm, VB=6.00L State C PC=24.0atm, VC=6.00L State D PD=24.0atm, VD=23.50L Assume that the external pressure is constant during each step and equals the final pressure of the gas for that step. Calculate q for this process. Calculate w for this process. Calculate ΔE for this process Calculate ΔH for this process.arrow_forwardONLY B,C,D ( NEED NEAT HANDWRITTEN SOLUTION ONLY OTHERWISE DOWNVOTE).arrow_forward3.6 Determine the phase or phases in a system consisting of H.O at the following conditions and sketch p-v and T-v diagrams showing the location of each state. (a) p 10 bar, T = 179.9°C (b) p 10 bar, T= 150°C (c) T 100 C, p = (d) T 20°C, p (e) p 1 bar, T =-6°C. 3.7 The following table lists temperatures and specific volumes of water vapor at two pressures: I = 0.5 bar. - 50 bar. p 1.5 MPa p 1.0 MPa (m/kg) (m'/kg) T(C) T(C) 0.1325 200 0.2060 0.2275 0.2480 200 0.1483 240 280 240 280 0.1627 Data encountered in solving problems often do not fall exactly on the grid of values provided by property tables and linear interpolation between adjacent table entries becomes necessary, Using the data provided here, estimate (a) the specific volume at T 240°C, p 1.25 MPa, in m'/kg. (b) the temperature at p 1.5 MPa, v 0.1555 m/kg, in °C. (c) the specific volume at T 220°C, p 1.4 MPa, in m'/kg. 3.11 For each case, determine the specific volume at the indicated state. Locate the state on a sketch of the…arrow_forward
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