A 0.4m^3 tank contains oxygen initially at 120-bar and 30C. A paddlewheel within the tank is rotated until the pressure inside rises to 184bar. During the process 20kJ of heat is lost to the surroundings. Determine the absolute value of paddlewheel work. For oxygen, assume a constant specific heat capacity of cv = 0.658kJ/kg^-1/K^-1 and R = 0.2598 kJ/kg^-1/K^-1

1 kg of gas occupying 0.19 m' at a pressure of 15 bar is heated at constant pressure until its volume is 0.35 m'. The gas is then expanded adiabatically until its volume is 2 m'. Calculate: 1- Temperature at the end of constant pressure heating and the end of adiabatic expansion. Take Cp = 1.068 kJ/kg.K and Cv=0.775 kJ/kg.K. 2- Total work done.

Oxygen (molar mass 32 kg/kmol ) expands reversibly in a cylinder behind a piston at a constant pressure of 3.176 bar. The volume initially is 0.0119 m3 and finally is 0.032 m3; the initial temperature is 17.83 0C. Calculate the heat supplied during the expansion in the correct unit to two decimal places. Assume oxygen to be a perfect gas and take the specific heat at constant pressure as =  0.917 k J / k g K and molar gas constant as  =  8,314  J / kmol K

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

One kilogram of an ideal gas at 5.5 bar with an initial volume of 0.3 m expands to a final volume of 0.5 m in accordance with the equation 13 pV = C. Find the heat transfer during the process. Take R = 0.287 kJ/kg-K and C¸ = 0.713 kJ/kg-K.

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Oxygen (molar mass 32 kg/kmol ) expands reversibly in a cylinder behind a piston at a constant pressure of 3.196 bar. The volume initially is 0.0117 m3 and finally is 0.0314 m3; the initial temperature is 17.56 0C. Calculate the heat supplied during the expansion in the correct unit to two decimal places. Assume oxygen to be a perfect gas and take the specific heat at constant pressure as =  0.917 k J / k g K and molar gas constant as  =  8,314  J / kmol K

In a piston-cylinder setup, 2 kg of water undergoes a constant temperature expansion at T=200°C from a volume of V1 = 0.196 m³ to a pressure of p2 = 1 bar . We want to know what the work performed and heat transferred is during this process. If the heat transfer during the expansion process is Q1-2 = 3000 kJ, what is the work done? (Report your answers in kJ)

Inside a piston cylinder is 1 kg of pure water at 22°C. The piston is 12 cm in diameter and has a weight of 17 kgs. (State A) The pressure applied remains constant but heat is added to the water until the piston until it reaches the stoppers at a volume of 0.3 m^3. (State B) At constant volume, more heat is added until the temperature of the water reaches 300°C. (State C) A. Determine the quality of the fluid at State B. B. Determine the mass of the vapor at State B. C. Determine the pressure at State C. 800 Vapor Liquid State A Liquid State A Vapor State A