Fundamentals Of Thermodynamics
10th Edition
ISBN: 9781119494966
Author: Borgnakke, C. (claus), Sonntag, Richard Edwin, Author.
Publisher: Wiley,
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Textbook Question
Chapter 6, Problem 6.14P
Determine the missing property among P,T,s, and x for R−410A at
a.
b.
c.
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+Complete the following table:
P kPa
T°C
H20
R-134a
H20
R-134a
H20
R-134a
H20
R-134a
1000
500
200
500
300
100
150
200
500
-10
v m³/kg
0.05000
u kJ/ks
200
h kJ/kg
1200
s kJ/(kg K)
7.5410
1
X
phase
saturated
liquid
6. (20 pts) The specific heat of a certain ideal gas is given as a function of
4.13 x 10*
KJ
345.1
temperature: Cp = [1.54 -
when temperature increases
T
kg K
from 325°K to 1,100°K. Find the change of enthalpy. (Ans: 862.21
A perfect gas undergoes a process according
to the law, Tc
2/5
V d0. Initial pressure and
volume are 1 bar and 0.14 m respectively.
After the process the volume of the gas
becomes 0.07 m°. Find the work done during
the process and its final pressure.
Assume, R = 287 Nm/kg K.
Chapter 6 Solutions
Fundamentals Of Thermodynamics
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- Reinneil Law-ay Active Now 5. The temperature of 3.00 kg of N2 gas is raised from 10*C to 110 *C. If this is done at constant pressure, find the increase in internal energy U and external work done W by the gas. For N2 gas, Cv = 0.177 cal/g*C and Cp = 0.248 cal / g*C %3D •.. More Edit IIarrow_forward1) Given a vessel with V = 0.4 m3 filled with m = 2 of H2O at P = 600 kPa, find • the volume and mass of liquid, and • the volume and mass of vapor.arrow_forwardPROCESSES OF PURE SUBSTANCE: There are 3 kg/min of steam undergoing an isothermal process from 30 bar and 350 oC to 7 bar. (note 1 bar = 100 kPaa). Find: a) ΔS (kJ/k), b) Heat transferred (kJ), c) ΔH (kJ), d) ΔU (kJ) (SHOW COMPLETE SOLUTION) (IMPORTANT! SHOW THE P-V AND T-S DIAGRAM PLEASE)arrow_forward
- Two pounds of gas, R= 26 ft-lb /lb-R and k=1.10, undergo a polytropic from 15 psia, 100 F to 75 psia, 3.72 ft0. Determine the value of “n”, ΔH, ΔS, Q and Work.arrow_forwardUsing the tables for water, determine the specified property data at the indicated states. (a) At p = 3 bar, v = 0.3 m³ /kg, find T in °C and u in kJ/kg. T = U = (b) At T = 320°C, v = p = U = V = h = °C P = kJ/kg = 0.034 m³ /kg, find p in MPa and u in kJ/kg. (c) At p = 28 MPa, T = 400 °C, find v in m³ /kg and h in kJ/kg. m³/kg h = MPa kJ/kg (d) At T = 10°C, v = 100 m³ /kg, find p in kPa and h in kJ/kg. kJ/kg kPa kJ/kgarrow_forward1 PROBLEM 3.0 Two and a half kg of an ideal gas with R = 296.9 J/(kg) (K) and c, = 0.7442 kJ/(kg)(K) at a pressure of 827.4 kPa and a temperature of 667°C reject 132.2 kJ of heat at a constant pressure. The gas is then expanded according to pV1 25 = C to a point where a constant volume process will bring the gas back to its original state. Determine The heat added in KW The power in kW for 100 Hz.,arrow_forward
- One-quarter Ibmol of oxygen gas (O2) undergoes a process from p1 = 20 lb;/in?, T1 = 500°R to p2 = 150 Ib/in?. For the process W = -500 Btu and Q = -152.5 Btu. Assume the oxygen behaves as an ideal gas. Determine T2, in °R, and the change in entropy, in Btu/PR.arrow_forward1. An ideal gas undergoes a process for which the volume remains constant. At the start of the process, p = 15.625 psia, T¡ = 540 R, at the end p2 = 17.425 psia, T2 = 630 R. What is the work done (in Btu/ib) on the system? Your answer Submitarrow_forwardOne kilogram on a monoatomic ideal gas undergoes the following four step process starting at Point A (100 kPa, 300K, 4 m^3) • A =>B Isothermal compression that quarters the volume (to 1 m^3) •B => C Isobaric expansion that triples the temperature (to 900K) •C=> D Adiabatic expansion to the original volume (to 4 m^3). •D=> A Isochoric process to the original pressure (to 100 kPa). (a) Determine P, V, and T, for all points. (b) What is AU, Q, W, AH & AS for each leg of the cycle? (c) What is the efficiency of this cycle? (d) Sketch a P-V diagram and T-S diagram, indicating P, V, T, for all points & AU, Q, W, AH & AS for each leg.arrow_forward
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