Chapter 5, Problem 5.54P

The following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m3/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1./= constant. 4-1: heating at constant volume back to the initial conditions. Calculate the work done for the isothermal process in J.

pls answer the given

A spring-conditioned cylinder-piston device contains 0.25kg of air and operates under the following thermodynamic cycle:1 -> 2: In state 1, P_1 = 200kPa and V_1 = 0.25m ^ 3. The compressed spring is released and the air is compressed, until the spring no longer stores energy and the piston simply rests on the stops: P_2 = 300kPa and V_2 = 0.10m ^ 3.2 -> 3 After compression the heat is removed and the pressure drops to 100kPa in state 3.3 -> 1: Heat is added, the spring is compressed, and the air expands to state 1. a) Make a diagram of the process and trajectories.b) Determine the air temperature in the 3 states.c) Calculate the work from state 1 to 2.d) Calculate the work from state 3 to 1.e) Calculate the total work of the cycle and who performs it.

1. A tank containing 250 kg of kerosene is to be heated from 20°C to 40 °C in 15 minutes, using 4 bar steam. The kerosene has a specific heat capacity of 2.0 kJ/kg-°C.over that temperature range. ha at 4.0 bar is 2,108.1 kJ/kg. The tank is well insulated and heat losses are negligible. Determine the rate of heat transfer required and steam flow.

Two pounds of carbon dioxide (CO2) as an ideal gas executes a Carnot power cycle while operating between thermal reservoirs at 560 and 100°F. The pressures at the initial and final states of the isothermal expansion are 400 and 200 Ib;/in?, respectively. The specific heat ratio is k = 1.24. Determine the thermal efficiency, the work for the isothermal expansion, in Btu, and the work for the adiabatic expansion, in Btu.

Neglecting KE and PE, calculate the heat added. A gas undergoes a thermodynamics cycle consisting of three processes beginning at an initial state where P1=100kPa and V1=1.5m3. The processes are as follows: Process 1-2: compression with PV =C to P2=200 kPa Process 2-3 :W23=0, Q23=-150 kJ and  Process 3-1: W31=+50 kJ a. 300kJ b. 100kJ c. 50kJ d. 200kJ

The following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1./= constant. 4-1: heating at constant volume back to the iniüal conditions. Calculate the work done for the constant volume heating process? Moving to another question will save this response. «< Questio acar A s P I R E

The figure belows shows three components of an air-conditioning system, where 105°F and 4.5 lb/s. Refrigerant 134a flows through a throttling valve and a heat exchanger while air flows through a fan and the same heat exchanger. Data for steady-state operation are given on the figure. There is no significant heat transfer between any of the components and the surroundings. Kinetic and potential energy effects are negligible. Modeling air as an ideal gas with constant cp = 0.240 Btu/lb · °R, determine the mass flow rate of the air, in lb/s.

The following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m³/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1./= constant. 4-1: heating at constant volume back to the initial conditions. Calculate the work done for the expansion process in joules to 2 decimal places ?