4. Let’s say we have a 9 kg air mass. It is warmed from 37F to 78F under a constant pressure of 605 mb. Determine: (Show all SI Units)
(a) Heat absorbed by the air
(b) Work done
(c) Total change in internal energy
Let's say we have a 16 kg air mass. It is warmed from 34 F to 88 F under a constant pressure of 710 mb. Determine: (A) heat absorbed by the air (B) Work Done (C) Total change in internal energy. All work must be shown. Answers must be in standard SI units, in most simple form.
D) One kilogram of dry air is warmed from 20°C to 70 °C under a constant pressure of 1 atmosphere. Calculate: (a) the heat absorbed by the gas, (b) the work done, and (c) the change in internal energy. (50 250J, 14350J, 35 900 J).
Let’s say we have a bound spherical parcel of dry air. Its pressure is 772 mb, mass is 3.8 kg, and a spherical radius of 0.81 m. What is the temperature of this parcel?
9. A sample of chlorine gas (Cl2) (mass=5.56x10-kg), held at constant pressure (P=2.026x105Pa), is expanded from 40.0cm to 50.0cm. a. Determine the work output for this gas during the compression. b. Calculate the internal energy change for the gas. c. How much heat is absorbed/released by the gas?
part a. The air in an inflated balloon (defined as the system) is warmed over a toaster and absorbs 110 J of heat. As it expands, it does 79 kJ of work. What is the change in internal energy for the system? Express the energy in kilojoules to two significant figures. part b. When fuel is burned in a cylinder equipped with a piston, the volume expands from 0.235 L to 1.350 L against an external pressure of 1.02 atm...
A piston cylinder assembly fitted with a slowly rotating paddle wheel contains 0.13 kg of air at 300K. The air undergoes a constant pressure process to a final temp of 400K. During the process heat is transfered to the air by Q=12kJ. Assuming the ideal gas model with k=1.4 and negligible changes in kinetic and potential energy for the air, determine the work done by the paddle on the air and the work done by the air to displace the...
5.12 A long vertical cylinder of 100 mm bore, open at the top, contains 0.005 kg of allowed to settle to an equilibrium position. Heat energy is then supplied and the pistorn atmospheric air at 15°C. A close-fitting piston of mass 15 kg is placed in the cylinder and rises 300 mm. If friction is negligible, determine: (a) the absolute pressure of the air in the cylinder; (b) the heat energy supplied; (e) the change in internal energy of the...
4. A mass of 5 kg undergoes a process during which there is heat transfer from the mass at a rate of 6 kJ per kg, an elevation decrease of 34 m, and an increase in velocity from 13 m/s to 34 m/s. The specific internal energy decreases by 6 kJ/kg and the acceleration of gravity is constant at 9.7 m/s2. Determine the work for the process, in kJ. 5. A gas is compressed in a piston–cylinder assembly from p1...
A frictionless piston-cylinder device contains 0.2 kg of air at 100 kPa and 27°C. The air is now compressed slowly according to the relation P Vk = constant, where k = 1.4, until it reaches a final temperature of 77°C. Sketch the P-V diagram of the process with respect to the relevant constant temperature lines, and indicate the work done on this diagram. Using the basic definition of boundary work done determine the boundary work done during the process [-7.18...
USE THE AIR TABLES 0.5 kg of air is initially at 280 K, 100 kPa in a frictionless adiabatic piston-cylinder. Find the volume of the cylinder (m). Find the initial internal energy (kj/kg) using the air tables. A. B. The air is compressed po ytropically according to P * (V)1.4 = constant to a volume which is 32.3% of the initial volume (V.-0323 V). Find the new volume (m), pressure (kPa), temperature (K) and internal energy (kJ/kg). Find the work...