Question 2 (a) Please complete the following table for water as pure substance. Show your analysis clearly. State T, °C P, kPa i 300 ii 200 400 iii 120 500 iv 300 v, m³/kg 0.100 Phase of substance Saturated vapor (b) Please plot all states below on the same T-v diagram with respect to saturation lines. Saturated mixture at pressure of 250 kPa and with quality of 0.50. (i) (ii) Saturated liquid at pressure of 400 kPa. (iii) Saturated vapor at pressure of 450 kPa. (iv) Superheated water at pressure of 400 kPa and temperature of 500°C. (c) A piston-cylinder device initially contained 0.5 kg of water at pressure of 650 kPa and temperature of 150 °C. During a process, the pressure of the water is reduced to 200 kPa in an isothermal manner. Determine the change in volume, m³. (i) (ii) Sketch the process on pressure versus specific volume (P-v) diagram with respect to saturation lines. Question 3 (a) An ideal gas expands from State 1 to State 2 according to PV = constant law. Derive the relationship shown in Equation (3.1) where To and R are constant temperature for both the states and gas constant, respectively. mRT V₂ = P2 (Eq. 3.1) (b) A piston cylinder assembly contains 0.6 m³ air at 200 kPa and 77 °C. The gas is compressed according to PV = constant to a volume of 0.4 m³. Assume air as ideal gas with R = 0.287 kJ/kg.K. i. Calculate the mass of the air, kg, ii. Calculate the final pressure of the air, kPa
Question 2 (a) Please complete the following table for water as pure substance. Show your analysis clearly. State T, °C P, kPa i 300 ii 200 400 iii 120 500 iv 300 v, m³/kg 0.100 Phase of substance Saturated vapor (b) Please plot all states below on the same T-v diagram with respect to saturation lines. Saturated mixture at pressure of 250 kPa and with quality of 0.50. (i) (ii) Saturated liquid at pressure of 400 kPa. (iii) Saturated vapor at pressure of 450 kPa. (iv) Superheated water at pressure of 400 kPa and temperature of 500°C. (c) A piston-cylinder device initially contained 0.5 kg of water at pressure of 650 kPa and temperature of 150 °C. During a process, the pressure of the water is reduced to 200 kPa in an isothermal manner. Determine the change in volume, m³. (i) (ii) Sketch the process on pressure versus specific volume (P-v) diagram with respect to saturation lines. Question 3 (a) An ideal gas expands from State 1 to State 2 according to PV = constant law. Derive the relationship shown in Equation (3.1) where To and R are constant temperature for both the states and gas constant, respectively. mRT V₂ = P2 (Eq. 3.1) (b) A piston cylinder assembly contains 0.6 m³ air at 200 kPa and 77 °C. The gas is compressed according to PV = constant to a volume of 0.4 m³. Assume air as ideal gas with R = 0.287 kJ/kg.K. i. Calculate the mass of the air, kg, ii. Calculate the final pressure of the air, kPa
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:Question 2
(a) Please complete the following table for water as pure substance. Show your analysis clearly.
State
T, °C
P, kPa
i
300
ii
200
400
iii
120
500
iv
300
v, m³/kg
0.100
Phase of substance
Saturated vapor
(b) Please plot all states below on the same T-v diagram with respect to saturation lines.
Saturated mixture at pressure of 250 kPa and with quality of 0.50.
(i)
(ii)
Saturated liquid at pressure of 400 kPa.
(iii)
Saturated vapor at pressure of 450 kPa.
(iv)
Superheated water at pressure of 400 kPa and temperature of 500°C.
(c) A piston-cylinder device initially contained 0.5 kg of water at pressure of 650 kPa and temperature of
150 °C. During a process, the pressure of the water is reduced to 200 kPa in an isothermal manner.
Determine the change in volume, m³.
(i)
(ii)
Sketch the process on pressure versus specific volume (P-v) diagram with respect to saturation
lines.
Question 3
(a) An ideal gas expands from State 1 to State 2 according to PV = constant law. Derive the relationship
shown in Equation (3.1) where To and R are constant temperature for both the states and gas constant,
respectively.
mRT
V₂ =
P2
(Eq. 3.1)
(b) A piston cylinder assembly contains 0.6 m³ air at 200 kPa and 77 °C. The gas is compressed according
to PV = constant to a volume of 0.4 m³. Assume air as ideal gas with R = 0.287 kJ/kg.K.
i.
Calculate the mass of the air, kg,
ii. Calculate the final pressure of the air, kPa
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