1. Given that:i) the cp of Al is given by c,=20.7+0.0124*T (J/mol/K) in the temperature range from 298 to 932 K,ii) the cp of Al2Oz is given by cp=106.6 + 0.0178*T - 2,850,000*T² (J/mol/K) in the temperature rangefrom 298 to 1800 K, andiii) for Al2O3 its enthalpy of formation from elements at 298 K is -1675.7 kJ/mol,please calculate enthalpy content of Al and Al203 at 298 and 900 K.

Answered: Image /qna-images/answer/3297538a-5bea-4e72-93bb-4db2b820e46e.jpg

Answered: 1. Given that: i) the cp of Al is given…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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2. For a certain gas, R = 0.377KJ/kg.K and k = 1.384. (a)What are the values of c, and a, ? (b) What mass of this gas would occupy a volume of 0.552 m at 517.11 kPa and 36.7 deg. Celsius? (c) If 31.65 kJ is transferred to this gas at constant volume, what are the resulting temperature and pressure? Use 2kgm
1. Calculate Z and V for ethylene at 25°C and 12 bar by the following equations: a. The truncated virial equation with the following experimental values of virial coefficients: B=-140 cm ³ · mol -1,C=7200 cm 6. • mol -2 В Z = 1+-+ V2 V ВР b. The truncated virial equation, Z = 1 + with a value of B from the generalized Pitzer RT correlation for the second virial coefficient. c. The Redlich/Kwong equation d. The Soave/Redlich/Kwong equation e. The Peng/Robinson equation
90+ 90 bpB Vapor 80 80 70- 70 60 tva Liquid 1+ 60 50 50 100% A 0% 80 20 60 40 40 60 20 0% 100% B 80 b. What is the composition of its vapor V,? Temperature-
2 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 0C 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 = 3000C x=? h=? Phase State=? e.) T = 5000C h = 3487.7 kJ / kg P=? x=? ν=?
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3-21 Complete this table for H,O: T, °C Р, КРа u, kJ/kg Phase description 400 1450 220 Saturated vapor 190 2500 4000 3040 3-22 Complete this table for H,O: T, °C Р. КРа U, m'/kg Phase description 140 0.035 550 Saturated liquid 125 750 300 0.140
1. An uninsulated cylinder with a locked piston containing 0.35 moles of gas is placed in a boiling water bath at TH = 100°C. The volume of the piston is 0.52 liters. This point is labeled as 1 in the diagram below. TH> Tc To Vi V2 (a) The piston is unlocked and the gas is allowed to expand to a volume of 1.14 liters, moving the system from point 1 to point 2. What is the heat flow? What is the work done by the gas? (b) The piston is locked and moved to an ice bath at Tc = 0°C, moving the system from point 2 to point 3. What is the heat flow? What is the work done by the gas? (c) The piston is unlocked to move the system from point 3 to point 4. What is the heat flow? What is the work done by the gas? (d) To move the system from point 4 to point 1, the cylinder is locked and the is gas returned to the boiling water bath. What is the heat flow? What is the work done by the gas? (e) This heat engine is called a Stirling Cycle. What is its efficiency? (f) If a Carnot engine were operated…
1.)Answer the following: a.) 200 grams of water are mixed with 100 grams of alcohol (ρ = 790 kg/m3). What is the density of the mixture in kg/m3 assuming the fluid is mixed completely? b.) A 10 lbm metal ball has a temperature of 200F when it is placed in a 50 lbm bath of water at room temperature (72F). Heat transfer occurs between the two substances until equilibrium is reached. Find this equilibrium temperature. (Cmetal = 4.3 BTU/lbm –F)
6. The density of air at 127 ºC and 5 bar is
Suppose there are two identical gas cylinders. One contains the monatomic gas krypton (Kr), and the other contains an equal mass of the monatomic gas radon (Rn). The pressures in the cylinders are the same, but the temperatures are different. Determine the ratio KEr /KERN of the average kinetic energy of an atom of krypton to the average kinetic energy of an atom of radon. The answer should be a value.
TOPIC: PROPERTIES OF SUBSTANCES: Note: The pressure values are absolute values unless specified. Determine the properties of H2O with units according to the following Table: Sketch of location of point in TS diagram below using P, T and x lines as applicable CONDITIONS: 1. Liquid at P = 20 Mpa and T= 190 C 2. Saturated liquid at T = 223.75 deg C 3. Steam with quality of 90 % at P = 6.7 Mpa 4. Dry steam at P = 18.05 Mpa 5. Steam at T =167 C, moisture = 3% 6. Steam with P = 3.42 Mpa and T = 460 C 7. Steam at 17.398675 Mpa gage, T=454.75 C 8. Steam at P = 17.0 Mpa, deg SH = 60 C 9. Saturated vapor at 40 bars 10. Boiling Point of H2O in deg Celsius at atmospheric pressure of 0.19 Mpa ; ANSWERS: h = V = U= S= h = U= S= h = U= S= h = U= V = U= V= h = S= T boiling point = in a pdf
2) 3 mol of an ideal gas undergoes a process abc shown in the following PV diagram: P (10 Pa) 4 2 1 b la 2 V (10-³ m³) 3 4 5 The type of gas is unknown but UCD physicists measure its heat capacity to be 99.8 J/K when pressure is constant. Determine the total heat transfer for the process a b c. There are no phase changes. 6

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