
a)
The final temperature of the helium
a)

Answer to Problem 175RP
The final temperature of the helium is
Explanation of Solution
Write the relation between the pressure and temperature in the isentropic process:
Here, temperature at state 2 is
Conclusion:
From the Table A-2, “Ideal-gas specific heats of various common gases table”, select the specific heat ratio
Substitute
b)
The final volume of nitrogen
b)

Answer to Problem 175RP
The final volume of nitrogen is
Explanation of Solution
Write the expression for calculating the initial volume of helium
Here, mass of the helium is
Write the expression for calculating the initial volume of helium
Here, mass of the helium is
Write the expression for the final volume of the nitrogen
Here, volume of the nitrogen at initial state 1 is
Conclusion:
From the Table A-2, “Ideal-gas specific heats of various common gases table”, select the gas constant for the helium gas as
Substitute
Substitute
Substitute
Thus, the final volume of nitrogen is
c)
The heat transferred to the nitrogen.
c)

Answer to Problem 175RP
The heat transferred to the nitrogen is
Explanation of Solution
Write the expression for calculating the mass of the nitrogen
Write the expression for calculating the temperature of the nitrogen
Write the formula for the change in internal energy of the nitrogen.
Here, specific heat capacity of nitrogen at constant volume is
Write the formula for the change in internal energy of the Helium.
Here, specific heat capacity of Helium at constant volume is
Write the formula for the energy balance equation for the system:
Conclusion:
From the Table A-2, “Ideal-gas specific heats of various common gases table”, select the gas constant for the helium gas and specific heat constant at constant volume for the helium gas as
From the Table A-2, “Ideal-gas specific heats of various common gases table”, select the gas constant for the Nitrogen gas and specific heat constant at constant volume for the helium gas as
Substitute
Substitute
Substitute
Substitute
Substitute
Thus, the heat transferred to the nitrogen is
d)
The entropy generation during the process
d)

Answer to Problem 175RP
The entropy generation during the process is
Explanation of Solution
Write the expression for the entropy generation for the isentropic process:
Here, specific heat capacity of nitrogen at constant pressure is
Conclusion:
Substitute 0.2185 kg for
Thus, the entropy generation during the process is
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Chapter 7 Solutions
EBK THERMODYNAMICS: AN ENGINEERING APPR
- For a gas whose equation of state is P(v-b)=RT, the specified heat difference Cp-Cv is equal to which of the following (show all work): (a) R (b) R-b (c) R+b (d) 0 (e) R(1+v/b)arrow_forwardof state is Derive an expression for the specific heat difference of a substance whose equation RT P = v-b a v(v + b)TZ where a and b are empirical constants.arrow_forwardTemperature may alternatively be defined as T = ди v Prove that this definition reduces the net entropy change of two constant-volume systems filled with simple compressible substances to zero as the two systems approach thermal equilibrium.arrow_forward
- Using the Maxwell relations, determine a relation for equation of state is (P-a/v²) (v−b) = RT. Os for a gas whose av Tarrow_forward(◉ Homework#8arrow_forwardHomework#8arrow_forwardBox A has a mass of 15 kilograms and is attached to the 20 kilogram Box B using the cord and pulley system shown. The coefficient of kinetic friction between the boxes and surface is 0.2 and the moment of inertia of the pulley is 0.5 kg * m^ 2. After 2 seconds, how far do the boxes move? A бро Barrow_forwardBox A has a mass of 15 kilograms and is attached to the 20 kilogram Box B using the cord and pulley system shown. The coefficient of kinetic friction between the boxes and surface is 0.2 and the moment of inertia of the pulley is 0.5 kg * m^2. Both boxes are 0.25 m long and 0.25 m high. The cord is attached to the bottom of Box A and the middle of box B. After 2 seconds, how far do the boxes move? A From бро Barrow_forwardHomework#8arrow_forwardSign in PDF Lecture W09.pdf PDF MMB241 - Tutorial L9.pdf File C:/Users/KHULEKANI/Desktop/mmb241/MMB241%20-%20Tutorial%20L9.pdf II! Draw | I│Alla | Ask Copilot + of 4 D Topic: Kinetics of Particles: - Forces in dynamic system, Free body diagram, newton's laws of motion, and equations of motion. TQ1. The 10-kg block is subjected to the forces shown. In each case, determine its velocity when t=2s if v 0 when t=0 500 N F = (201) N 300 N (b) TQ2. The 10-kg block is subjected to the forces shown. In each case, determine its velocity at s-8 m if v = 3 m/s at s=0. Motion occurs to the right. 40 N F = (2.5 s) N 200 N 30 N (b) TQ3. Determine the initial acceleration of the 10-kg smooth collar. The spring has an unstretched length of 1 m. 1 σ Q ☆ Q 6 ا الى ☑arrow_forwardSign in PDF Lecture W09.pdf PDF MMB241 - Tutorial L9.pdf File C:/Users/KHULEKANI/Desktop/mmb241/MMB241%20-%20Tutorial%20L9.pdf II! Draw | I│Alla | Ask Copilot + 4 of 4 | D TQ9. If motor M exerts a force of F (10t 2 + 100) N determine the velocity of the 25-kg crate when t kinetic friction between the crate and the plane are μs The crate is initially at rest. on the cable, where t is in seconds, 4s. The coefficients of static and 0.3 and μk = 0.25, respectively. M 3 TQ10. The spring has a stiffness k = 200 N/m and is unstretched when the 25-kg block is at A. Determine the acceleration of the block when s = 0.4 m. The contact surface between the block and the plane is smooth. 0.3 m F= 100 N F= 100 N k = 200 N/m σ Q Q ☆ ا الى 6 ☑arrow_forwardmy ID# is 016948724 please solve this problem step by steparrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_iosRecommended textbooks for you
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