Problem 1. Initially, 0.05kg of air is contained in a piston cylinder device at 200 °C and 1.6 MPa. The air then expands at constant temperature to a pressure of 0.4 MPa. Assume the process occurs slowly enough that the acceleration of the piston can be neglected. The ambient pressure is 101.35kPa. (i) Determine the work (kJ) performed bt the air in the cylinder on the piston. (ii) Determine the work (kJ) performed by the piston on the ambient environment. Neglect the cross- sectional area of the connecting rod. (iii) Determine the work transfer (kJ) from the piston to the connecting rod. Neglect friction between the piston and cylinder. Assume that no heat transfer to or from the piston occurs and that the energy of the piston does not change.

Problem 1. Initially, 0.05kg of air is contained in a piston cylinder device at 200 °C and 1.6 MPa. The air then expands at constant temperature to a pressure of 0.4 MPa. Assume the process occurs slowly enough that the acceleration of the piston can be neglected. The ambient pressure is 101.35kPa. (i) Determine the work (kJ) performed bt the air in the cylinder on the piston. (ii) Determine the work (kJ) performed by the piston on the ambient environment. Neglect the cross- sectional area of the connecting rod. (iii) Determine the work transfer (kJ) from the piston to the connecting rod. Neglect friction between the piston and cylinder. Assume that no heat transfer to or from the piston occurs and that the energy of the piston does not change.

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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Question

Problem 1.
Initially, 0.05kg of air is contained in a piston cylinder device at 200 °C and 1.6 MPa. The air
then expands at constant temperature to a pressure of 0.4 MPa. Assume the process occurs
slowly enough that the acceleration of the piston can be neglected. The ambient pressure is
101.35kPa. (i) Determine the work (kJ) performed bt the air in the cylinder on the piston. (ii)
Determine the work (kJ) performed by the piston on the ambient environment. Neglect the cross-
sectional area of the connecting rod. (iii) Determine the work transfer (kJ) from the piston to the
connecting rod. Neglect friction between the piston and cylinder. Assume that no heat transfer to
or from the piston occurs and that the energy of the piston does not change.

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A rigid tank of volume 10 m³ initially contains saturated water vapor at a temperature of 120 °C. Steam at a pressure 1.2 MPa and a temperature of 400 °C enters the tank through a valve in steam line that is connected to the tank until the final pressure in the tank is 800 kPa, at which time the temperature is 200 °C. All kinetic and potential energy effects can be neglected. A schematic of the problem and properties at all state points except state 1 are shown in the figure below. All of the properties at state 2 and the inlet state i are provided on the figure. Initial State in Tank T₁-120 °C, Sat. vapor u₁=? kJ/kg V₁=? m³/kg Pi=1.2 MPa, Ti-400 °C hi-3261.3 kJ/kg V=10 m³ Final State in Tank T: 200 °C, P₂-800 kPa u₂= 2631.1 kJ/kg v₂=0.26088 m³/kg Qout For Question 6: The initial specific internal energy, u1, of the saturated vapor in the tank in kJ/kg is
Hi, pls help me solve this problem. Thank you so much.
Air as an ideal gas is contained in a piston/cylinder system constrained by a non-linear spring. Initially the gas in the cylinder is at 100 kPa, which is balanced by the atmospheric pressure outside of the cylinder (the weight of the piston is negligible). The force on the spring at the start is zero. The spring force is F=kx². k=600. kNt/m². The cross-sectional area of the piston is 1 m², the initial volume is 1 m³, and the initial temperature is 300 K. Heat is added until the volume of the gas has expanded to 1.5 m³. Find: (a) The work done by the gas on the face of the piston (kJ). (b) The final temperature (K). (c) The amount of heat added (kJ). Hint: This problem is easiest if you calculate the spring work and the atmospheric work separately. Air V₁=1.0 m³ Piston Area = 1.0 m² T₁=300 K P₁=100 kPa Atmospheric P on upper piston face= 100 kPa
Show detailed work. No Chatgpt,Only Handwritten.
Dont copy from others and answer should match. A large kitchen pot initially contains 5 kg of water at 25°C. A burner is turned on and heat is added to the water at a rate of 500 cal/sec. Determine how many minutes it will take for one-half of the mass to evaporate at standard atmospheric pressure.