Changes in kinetic and potential energies is zero

Assignment Help Mechanical Engineering

Reference no: EM13711483

Ten cubic feet of air is cooled at a constant pressure of 80 psi. The initial temperature is 180 0F and the final temperature is 100 0F. Assume air is an ideal gas, Cp = 0.241 Btu/lb 0R and Cv = 0.173 Btu/lb 0R and R = 1545 lbf/lbmol 0R, M = 28.97 lb/lbmol. The changes in kinetic and potential energies is zero. Determine:

a) total mass of the air in lb

b) the work in btu

c) chage in internal energy in btu

d) heat transfer

e) change in enthalpy

Reference no: EM13711483

Questions Cloud

Converted at constant pressure to saturated steam : Liquid water is fed to a boiler at 24ºC and 10 bar is converted at constant pressure to saturated steam. Use the steam tables to calculate H (kJ/kg) for this process, and then calculate the heat input required to produce 15,000 m3/h of steam at the e..

Nozzle to keep it from moving horizontally backwards : A fireman is using a 10-cm inside-diameter fire hose is trying extinguish a fire. He is aiming the hose at 45Â° with respect to the horizontal and the water lands 30 m from the fire fighter. On the end of the fire hose is a nozzle. The inside diamete..

What is the discharge velocity : Air enters an adiabatic nozzle at 3 atm pressure and 100 F and emerges at 1 atm and 30 F. The inlet velocity is negligible. What is the discharge velocity?

What is the amplitude of the force transmitted to building : Consider a model of a building whose base moves as a result of an earthquake. The building can be modeled as a single-degree-of-freedom spring-mass system where the building mass is lumped on top of two beams used to model the walls of the building.

Changes in kinetic and potential energies is zero : Ten cubic feet of air is cooled at a constant pressure of 80 psi. The initial temperature is 180 0F and the final temperature is 100 0F. Assume air is an ideal gas, Cp = 0.241 Btu/lb 0R and Cv = 0.173 Btu/lb 0R and R = 1545 lbf/lbmol 0R, M = 28.97 lb..

Solid glass-polymer reinforced composite rod : Solid glass-polymer reinforced composite rod (diameter = 100 mm) is simultaneously torqued clockwise (T = 1,000 Nm) and given a tensile load (P = 0). Determine shear strain. Determine extensional strains in n and t directions.

Calculate the maximum shear stress for each stress element : A cantilever beam with a 1 in diameter is loaded at the tip with a transverse force of 1000 lb. Figure 2.1 below shows the beam configuration and cross-section with points A at the top, point B at the center and point C at the midpoint between A and ..

Heat exchanger tubes have to be shorter txceed : In a Modified Rankine Cycle used in a power plant in Wichita, KS, a Shell and Heat Exchanger needs to be installed. Water from the turbine at 90 C is cooled to 80 C in a shell-tube HX using 150 kg/s of raw water from Power Plant Lake.

Compute the natural frequency : Consider a model of a building whose base moves as a result of an earthquake. The building can be modeled as a single-degree-of-freedom spring-mass system where the building mass is lumped on top of two beams used to model the walls of the building. ..

User Account

All Pages