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The enthalpy of a real gas is a function of pressure as described below. These data were taken for a real fluid. Estimate the enthalpy of the fluid at 400 K and 50 atm
V, L | |||
P, atm |
|
|
|
0.1 | 220 | 250 | 282.5 |
5 | 4.1 | 4.7 | 5.23 |
10 | 2.2 | 2.5 | 2.7 |
20 | 1.35 | 1.49 | 1.55 |
25 | 1.1 | 1.2 | 1.24 |
30 | 0.90 | 0.99 | 1.03 |
40 | 0.68 | 0.75 | 0.78 |
45 | 0.61 | 0.675 | 0.7 |
50 | 0.54 | 0.6 | 0.62 |
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Chapter 24 Solutions
EBK NUMERICAL METHODS FOR ENGINEERS
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- Calculate AH, AU, w, and q for the reversible heating of 1 mol of liquid water from 273 K to 373 K at 1 atm. ΔΗΞ 1806.88 You are correct AU = -1065.729 You are incorrect W = -741.151 You are incorrect q= 1806.88 You are correct X cal cal X cal calarrow_forwardWhich of the following is most likely the specific volume of steam at P = 1000 kPa and T = 800 °C?0.35281 m3/kg0.41177 m3/kg0.49432 m3/kg0.61813 m3/kg Which of the following is most likely the specific volume of carbon dioxide at P = 6000 kPa and T = 320 °C?0.01053 m3/kg0.01097 m3/kg0.01771 m3/kg0.01840 m3/kg Which of the following is most likely the specific volume of ammonia at P = 800 kPa and T = 200 °C?0.16068 m3/kg0.18819 m3/kg0.22669 m3/kg0.28445 m3/kgarrow_forwardA mixture of 0.3 kg of carbon dioxide and 0.2 kg of nitrogen is compressed from p₁ = 1 bar, T₁ = 300 K to P₂ = 3 bars in a polytropic process for which n = 1.25. Determine (a) the final temperature, in K, (b) the work, in kJ, (c) the heat transfer, in kJ, (d) the change in entropy of the mixture, in kJ/K.arrow_forward
- An ideal gas initially at 1 atm and 2 ft undergoes a process to 75 psig and 0.60 ft°, during which the enthalpy increases by 16.5 Btu; cy = 2.25 Btu/lb. R°. Determine the value of the gas constant in ft.lb;/lbmR. O 2410.94 O 6.68 O 3.10 660.44arrow_forwardWhich of the following statements is incorrect? If the change in temperature and the specific heat at constant volume are given, then the A change in internal energy can be found. В B The specific heat ratio for a gas is always greater than unity. If the change in temperature and the specific heat at constant pressure are given, then the change in enthalpy can be found. If the change in temperature and the specific heat at constant pressure are given, then the D change in internal energy can be found.arrow_forward2 properties are given to define the state of water using pure substance tables given below. Determine the properties or properties requested from you, asked for the following situations, using thermodynamic tables, and show each operation on your paper.a. T=200°C, x=0.95 ν=?b. P=0.275 mPa, ν=0.05 m3 / kg, x=?c. x = 1.0, ν=0.8 m3 / kg, P=? T=?d. P=1700 kPa, T=3000°C, x=? h=? Phase State=?e. T=5000°C, h=3487.7 kJ / kg, P=? x=? ν=?arrow_forward
- An 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_forwardCarbon dioxide and oxygen is placed each inside a 1 m^3 tank separated by an isolation valve. Initially, carbon dioxide has the following properties: P=20 kPag & T=25 degrees celsius and that oxygen has the following properties: P=30 kPag & T=75 degrees celsius. If heat is being prevented to escape in the outside surroundings, determine the resulting temperature of the mixture if it is found that after opening the isolation valve, the resulting presure on both tank if 25 kPag.arrow_forwardPROCESSES OF PURE SUBSTANCE: A 2-kg steam water mixture at 1.0 MPaa is contained in an inflexible tank. Heat is added until the pressure rises to 3.5 MPaa and the temperature to 400 0C. Determine: a) Heat transferred (kJ), b) ΔH (kJ), c)ΔS (kJ/k) (SHOW COMPLETE SOLUTION) (SHOW THE P-V AND T-S DIAGRAM PLEASE)arrow_forward
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