Calculate the change in exergy of the contents
Course:- Physics
Reference No.:- EM13489704

Assignment Help
Assignment Help >> Physics

(1) A constant-pressure insulated piston-cylinder device contains 1.7 kg of saturated liquid-vapor mixture of water at 150 kPa with an initial quality of 0.2. Energy is then added to the system by an electric heater until all the liquid is vaporized. The environment is at 99 kPa and 2°C. Calculate the change in exergy of the contents in kJ.

(2) Air is cooled from 128°F to 62°F at a rate of 0.8 lbm/s in a heat exchanger. The coolant is water that enters the exchanger at 36°F and 0.6 lbm/s. What is the rate of exergy destruction in this heat exchanger, in units of Btu/s? Assume atmospheric pressure and negligible pressure drop in both fluids, and the environment is 46°F.

Put your comment

Ask Question & Get Answers from Experts
Browse some more (Physics) Materials
The Achilles tendon inserts on the calcaneus at a distance of 8cm from the axis of the ankle joint. The force generated by the muscles attached to the Achilles tendon is 300
An oscillating LC circuit has a current amplitude of8.50 mA, a potential amplitude of 250mV, and a capacitance of 235 nF. What is the maximum energy stored in the capacitor
A Carnot engine operates between a hot reservoir at 355.0 K and a cold reservoir at 265.0 K. If it absorbs 510.0 J of heat per cycle at the hot reservoir, how much work per
A 30 kg launching machine fires a 250 gram projectile horizontally at 100 m/s. This causes the machine to slide backward 1.122 meters before coming to a rest. how far would
A 38.0 kg child swings in a swing supported by two chains, each 3.04m long. The tension in each chain at the lowest point is 429N. Find out the child's speeds at the lowest po
You and a close friend stand facing each other. You are as close as you can get without actually touching. If a wire is attached to each of you, estimate the capacitance of t
A charge q1 = +6.00 uC is located at x = 0.200 m, and charge q2 = -3.00 uC is located at x = 0.300 m. If q1 is kept stationary, what is the work done by the electric force on
When a 20-V emf is placed across two resistors in series, a current of 2.0 A is present in each of the resistors. What is the magnitude of the greater of the two resistances