5. He (ideal gas, 1 mol) is sealed in a adiabatic gas cylinder. The initial stae...
A cylinder of monatomic ideal gas is sealed in a cylinder by a piston. Initially, the gas occupies a volume of 2.50 L and the pressure is initially 125 kPa. The cylinder is placed in an oven that maintains the temperature at a constant value. 80.0 J of work is then done on the piston, compressing the gas (in other words, the gas does -80 J of work). The work is done very slowly so that the gas maintains a...
Properties of energy 1 mol of an ideal gas at initial conditions p,-150 kPa, Vi-20 L was compressed to p2 450 kPa through adiabatic reversible compression. Determine the work, heat, change of internal energy, enthalpy and entropy for the process. The gas heat capacity is Cpm-29.10 J K mol
Twenty moles of a monatomic ideal gas (? = 5/3) undergo an adiabatic process. The initial pressure is 400 kPa and the initial temperature is 450 K. The final temperature of the gas is 320 K. In the situation above, the change in the internal energy of the gas, in kJ, is closest to:
Assume there's 1 mol ideal mono-atomic gas in a 22.4L container at 300K. The initial entropy of the system is 100J/K. For the following processes, calculate: a) q and w for a reversible expansion to twice the volume, isothermally. b) S and G for irreversible isothermal expansion against a constant 0.5 bar external pressure, to a final internal pressure of 0.5 bar. c) U and H for adiabatic reversible expansion to twice the volume.
Twenty moles of a monatomic ideal gas (γ = 5/3) undergo an adiabatic process. The initial pressure is 400 kPa and the initial temperature is 450 K. The final temperature of the gas is 320 K. In the situation above, the final volume of the gas, in SI units, is closest to: 0.19 0.35 0.23 0.27 0.31
1. (3 Points) Air (as an ideal gas) is compressed in an adiabatic compressor from an initial state of 100 kPa and 300K to a final state of at 200 kPa and 600K. Determine the change in specific entropy of air during this compression process. 2. (3 Points) A heat engine operates between two temperature limits of 1300 K and 400 K. It receives 1.2 MJ of heat while producing 500 kJ of useful work. Determine: a. The exergy of...
He gas is confined to a piston and cylinder with a mechanical stop that prevents the cylinder from expanding. The temperature of the gas is 298 K, the volume of gas in the cylinder is 1.20 L and its pressure is 2.15 bar. The ideal gas EOS is very accurate for He under these conditions. Starting from the final state of the He gas in part (b), the gas (and apparatus) was cooled from 298 K to 263 K. The...
Consider n moles of ideal gas kept in a heat-isolated cylinder (all processes are adiabatic) with a piston at external pressure p0, and at temperature T0. The external pressure is suddenly changed to p=2p0, and we wait for the system to equilibrate. The volume and the temperature of the ideal gas after equilibration is V and T, respectively. a) Calculate the amount w of work produced on the system in terms of p, p0, V, T0, and n. Using the...
Ideal Gas Decompression at Constant Volume. State Functions. An ideal gas sealed in a rigid 5.38-L cylinder, initially at pressure Pi=11.10 atm, is cooled until the pressure in the cylinder is Pf=1.42 atm. What is the enthalpy change for this process? ΔH = 1pts Tries 0/6 What is the change in internal energy for this process? ΔE = 1pts
A cylinder filled with ideal gas is sealed by a piston that is above the gas. The piston is a cylindrical object, with a weight of 45.0 N, that can slide up or down in the cylinder without friction. The area of the top (or the bottom) of the piston is 100 cm. The top of the piston is exposed to the atmosphere, and the atmospheric pressure is 100 kPa. As shown in the figure, the piston is tied to...