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The specific heat at constant pressure (Ep) of H2 at a temperature of 2000 F has...
Question 3 9 pts A gas has a specific heat at constant pressure of c-0.490 Btu/lb Btu/lbm. R. Det...
Question 3 9 pts A gas has a specific heat at constant pressure of c-0.490 Btu/lb Btu/lbm. R. Determine the molecular weight of this gas R and a specific heat at constant volume of c 0270 MW 1545 R-cJ (k-1)
Question 3 9 pts A gas has a specific heat at constant pressure of c-0.490 Btu/lb Btu/lbm. R. Determine the molecular weight of this gas R and a specific heat at constant volume of c 0270 MW 1545 R-cJ (k-1)
A constant specific heat ideal gas has a gas constant of 42.92 ft·lbf/(lbm·R) and a constant...
A constant specific heat ideal gas has a gas constant of 42.92 ft·lbf/(lbm·R) and a constant pressure specific heat of 0.200 Btu/(lbm·R). Determine the heat transferred and the change of total entropy if 9.00 lbm of this gas is heated from 40.0 °F to 340 °F in a rigid container.
Problem 2.3. An ideal ramjet is to fly at 20,000 ft with a Mach number of...
Problem 2.3. An ideal ramjet is to fly at 20,000 ft with a Mach number of 3.5. The burner exit total temperature is to be 3200 °?? and the engine will use 145 lbm/s of air. The heating value of the fuel is 18,500 Btu/lbm. What is the diameter of the rounded exit, thrust, dimensionless thrust, and TSFC at this condition? (Assume that the temperature is 447.38°??, the static pressure is 6.747161 psia, and the specific heat ratio is 1.4...
Air initially at 120 psia and 500*F is expanded by an adiabatic turbine to 15 psia...
Air initially at 120 psia and 500*F is expanded by an adiabatic turbine to 15 psia and 200* F. Assuming air can be treated as an ideal gas and has variable specific heat. a) Determine the specific work output of the actual turbine (Btu/lbm). b) Determine the amount of specific entropy generation during the irreversible process (Btu/lbm R). c) Determine the isentropic efficiency of this turbine (%). d) Suppose the turbine now operates as an ideal compressor (reversible and adiabatic)...
The molar heat capacity at constant pressure for water vapor varies with temperature according the equation:...
The molar heat capacity at constant pressure for water vapor varies with temperature according the equation: Cp / J.K mol-1 = 30.54 + 0.0103T/K Calculate the first law parameters (w, q, ΔU, and ΔH) when one mole of water vapor behaving as an ideal gas is heated at constant volume from 25° C to 200° C.
3. Air is heated from 5400 R to 12000 R while the pressure drops from 50 lbf/in2 to 40 lbf/in2, assuming constant specific heat (Cp 0.24 Btu/lbm-R) and R 53.33 Btu/lbm-R (a) Determine the change...
3. Air is heated from 5400 R to 12000 R while the pressure drops from 50 lbf/in2 to 40 lbf/in2, assuming constant specific heat (Cp 0.24 Btu/lbm-R) and R 53.33 Btu/lbm-R (a) Determine the change of entropy per pound of air (b) If the air was cooled from 1200° R to 540° R while the pressure drops from 50 lbf/in2 to 40lbf/in2 what does it say about the system entropy? Does the result violate the entropy increase principle?
3. Air...
Ch 19 HW Relationships between Molar Heat Capacities 9 of 23 Constants The amount of heat needed to raise the temperatu...
Ch 19 HW Relationships between Molar Heat Capacities 9 of 23 Constants The amount of heat needed to raise the temperature of 1 mole of a substance by one Celsius degree (or, equivalently, one kelvin) is called the molar heat capacity of the system, denoted by the letter C. If a small amount of heat dQ is put into n moles of a substance, and the resulting change in temperature for the system is dT, then Part A Consider an...
Problem 4 (hand-calculation): Consider the constant-pressure specific heat of air at high temperature presented in ta- ble 4, where T is the temperature and Cp is the specific heat. Determine a l...
Problem 4 (hand-calculation): Consider the constant-pressure specific heat of air at high temperature presented in ta- ble 4, where T is the temperature and Cp is the specific heat. Determine a least squares quadratic polynomial approximation for this set of data. The quadratic polynomial has the following form: Cp = a + bT+cT. where the coefficients a, b and c are to be determined using the least squares method. Hint Follow the derivation of linear regression discussed in class. You...
- Question 1 (a) In an ideal gas mixture, the partial pressure of a constituent gas...
- Question 1 (a) In an ideal gas mixture, the partial pressure of a constituent gas is: 25 points inversely proportional to the mole fraction inversely proportional to the square of the mole fraction equal to the mole fraction directly proportional to the mole fraction (b) The value of the universal molar gas constant is: 8.3145 J/(kmol) 8.3145 kJ/(kg) 8.3145 J/(kg) 8314.5 J/(kmol K) (c) A mixture of ideal gases consists of 4.42 kg of carbon monoxide (CO) and 5.91...
The amount of heat needed to raise the temperature of 1 mole of a substance by...
The amount of heat needed to raise the temperature of 1 mole of a substance by one Celsius degree (or, equivalently, one kelvin) is called the molar heat capacity of the system, denoted by the letter C. If a small amount of heat dQ is put into n moles of a substance, and the resulting change in temperature for the system is dT, then C=1ndQdT. This is the definition of molar heat capacity--the amount of heat Q added per infinitesimal...
Question 3 9 pts A gas has a specific heat at constant pressure of c-0.490 Btu/lb Btu/lbm. R. Determine the molecular weight of this gas R and a specific heat at constant volume of c 0270 MW 1545 R-cJ (k-1)
Question 3 9 pts A gas has a specific heat at constant pressure of c-0.490 Btu/lb Btu/lbm. R. Determine the molecular weight of this gas R and a specific heat at constant volume of c 0270 MW 1545 R-cJ (k-1)
3. Air is heated from 5400 R to 12000 R while the pressure drops from 50 lbf/in2 to 40 lbf/in2, assuming constant specific heat (Cp 0.24 Btu/lbm-R) and R 53.33 Btu/lbm-R (a) Determine the change of entropy per pound of air (b) If the air was cooled from 1200° R to 540° R while the pressure drops from 50 lbf/in2 to 40lbf/in2 what does it say about the system entropy? Does the result violate the entropy increase principle?
3. Air...
Ch 19 HW Relationships between Molar Heat Capacities 9 of 23 Constants The amount of heat needed to raise the temperature of 1 mole of a substance by one Celsius degree (or, equivalently, one kelvin) is called the molar heat capacity of the system, denoted by the letter C. If a small amount of heat dQ is put into n moles of a substance, and the resulting change in temperature for the system is dT, then Part A Consider an...
Problem 4 (hand-calculation): Consider the constant-pressure specific heat of air at high temperature presented in ta- ble 4, where T is the temperature and Cp is the specific heat. Determine a least squares quadratic polynomial approximation for this set of data. The quadratic polynomial has the following form: Cp = a + bT+cT. where the coefficients a, b and c are to be determined using the least squares method. Hint Follow the derivation of linear regression discussed in class. You...
- Question 1 (a) In an ideal gas mixture, the partial pressure of a constituent gas is: 25 points inversely proportional to the mole fraction inversely proportional to the square of the mole fraction equal to the mole fraction directly proportional to the mole fraction (b) The value of the universal molar gas constant is: 8.3145 J/(kmol) 8.3145 kJ/(kg) 8.3145 J/(kg) 8314.5 J/(kmol K) (c) A mixture of ideal gases consists of 4.42 kg of carbon monoxide (CO) and 5.91...
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