Thermodynamics

An absorption air-conditioning system is to remove heat from the conditioned space at 20°C at a rate of 120 kJ/s while operating in an environment at 35°C. Heat is to be supplied from a geothermal source at 160°C. The minimum rate of heat supply is:

Gas Laws: Partial pressure

A 100-L rigid tank contains an ideal gas mixture of 5 g of N2 and 5 g ofCO2 at a specified pressure and temperature. If N2 were separated from the mixture and stored at mixture temperature and pressure, its volume would be:

Gas Laws: Mass of steam

A 5-m3 rigid vessel contains steam at 20 M Pa and 400°C. The mass of the steam is:

Gas Laws: Adiabatic Compression of an ideal gas

Helium gas is compressed from 20°C and 6.20 m3/kg to 0.775m3/kg in a reversible and adiabatic manner. The temperature of helium after compression is:

Thermodynamics

An ideal reheat Rankine cycle operates between the pressure limits of 20 kPa and 8 MPa, with reheat occurring at 3 MPa. The temperature of steam at the inlets of both turbines is 500°C, and the enthalpy of steam is 3104 kJ/kg at the exit of the high-pressure turbine, and 2385 kJ/kg at the exit of the low-pressure turbine. Disre ...continues

Thermodynamics

A 2-m3 rigid tank contains nitrogen gas at 500 kPa and 300 K. Now the gas is compressed isothermally to a volume of 0.1 m3. The work done on the gas during this compression process is:

Kinetic Friction

Please instruct as to how to accomplish solving. I have no examples to refer to: In the figure, M2 has more mass than M1 and M1 has more mass than M3. The questions refer to the magintude of tension and weights ... (FOR COMPLETE PROBLEM AND DIAGRAM PLEASE SEE ATTACHMENT)

questions on the the kinetic theory and the gas laws

R = 8.31JK-1mol-1; k = 1.38 x 10-23 JK-1;standard atmospheric pressure 100.3kPa; mass of hydrogen molecule = 3.32x10-27kg 1. a fixed mass of gas at a constant temperature has a pressure of 50000Pa, and a volume of 3.2m2(square). The pressure is changed to 80000Pa. What is the new volume? 2. Some gas enclosed by a piston is c ...continues

Force

A 3.5 kg block is put on top of a 6 kg block. To cause the top block to slip on the bottom one, while the bottom one is held fixed, a horizontal force of at least 15.4 N must be applied to the top block. The assembly of blocks is now placed on a horizontal frictionless table. Please explain how to: 1. Find the magnitude ...continues

Thermodynamics

An ideal gas mixture consists of 3 kg of Ar and 6 kg of CO2 gases. The mixture is now heated at constant volume from 250 K to 350 K. The amount of heat transfer is: