While the pressure remains constant at 689.5 kPa the volume of a system of air changes from 0.567 m³ to 0.283 m³. What are (a) AU, (b) AH, (c) Q, (d) AS? (e) If the process is nonflow and internally reversible, what is the work? Ans. (a)- 490.2 kJ; (b) -686.3 kJ; (c) -686.3 kJ; (d) -0.6974 kJ/kg.K; (e) -195.8 kJ

While the pressure remains constant at 689.5 kPa the volume of a system of air changes from 0.567 m³ to 0.283 m³. What are (a) AU, (b) AH, (c) Q, (d) AS? (e) If the process is nonflow and internally reversible, what is the work? Ans. (a)- 490.2 kJ; (b) -686.3 kJ; (c) -686.3 kJ; (d) -0.6974 kJ/kg.K; (e) -195.8 kJ

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter4: The Second Law Of Thermodynamics

Section: Chapter Questions

Problem 2CQ: Explain in practical terms why efficiency is defined as

See similar textbooks

Similar questions

DATE A chudent is tHhe do ee I6X104I in the moving Out a dormi tory at the end the semer ter. of of his infemal of work in packing and moving his things decreacent by y-2 x 10"J. the following guan titiee w ca) W, (6) su, and process, Dekrmi ne and (c) Q. energt each of
A heat engine extracts 55 kJ from the hot reservoir and exhausts 40 kJ into the cold reservoir. What are (a) the work done and (b) the efficiency?
The work done is blowing a soap bubble of radius (R) is (W). The work done in making the soap bubble of radius (2R) from the same soap solution is: W/4 W/2 (a) (c) (b) (d) 2W 4W
A heat engine extracts 45.0 kJ from the hot reservoir and exhausts 40.0 kJ into the cold reservoir. What are the work done and the efficiency?
Q. 28 : The work done is blowing a soap bubble of radius (R) is (W). The work done in making the soap bubble of radius (2R) from the same soap solution is : (a) W/4 (b) 2W (c) W/2 (d) 4W
0. 31 : The work done in blowing a soap bubble from radius (r) to (2r) is : (a) 4tr'T (b) 12r'T (c) 8trT (d) 24 tr'T
A 150 Hb.- ball initially on the top of a 20 ft ladder is dropped and hits the ground-with re ference to the ground : a) what is the initial kinetic and potential energ Y ot 7 the ball ? by ft.Ibf unit b) What is the final Kinetic f potential energy of the ball? c) What is the change in kinetic. f potential energy for the process d) If all the initial potential energy were somehow Converted to heat, how many calories would this amount to ? How many Btu ? How many Joules ? 20 reference Sur farce
An engine doing work isothermally takes in 10kJ and exahusts 1kJ. What is the efficiency of the engine?
#1) in 2021, the tallest building in the world, the Burg khalifa, klas estimated at $1.5 billion. Suppose used to pay for an ordinary used. by 0.35 KW micro klave oven at a rate of $0.56/kw-h. this money the energy KS (e) How much energy with this $1.5 billon? to (in kJ) can be supplied (b) How long (in years) can the microwave oven be powered? please show step by step workings.
A large electrical power station generates 1050 MW of electricity with an efficiency of 37.0%. (a) Calculate the heat transfer (in J) to the power station, Q, in one day. (b) How much heat transfer Q. (in J) occurs to the environment in one day? (c) If the heat transfer in the cooling towers is from 35.0°C water into the local air mass, which increases in temperature from 18.0°C to 20.0°C, what is the total increase in entropy (in J/K) due to this heat transfer? J/K (d) How much energy (in J) becomes unavailable to do work because of this increase in entropy, assuming an 18.0°C lowest temperature? (Part of Q. could be utilized to operate heat engines or for simple space heating, but it rarely is.) to Additional Materials O Reading CS Scanned with CamScanner
A heat engine extracts 59 kJkJ from the hot reservoir and exhausts 32 kJkJ into the cold reservoir. What is the work done? What is the efficiency?
A) A bucket full of sand has a mass of 15 kg (including the bucket and the sand). The bucket is to be lifted to the top of a building 30 meters tall by a rope of negligible weight. However, the bucket has a hole in it, and leaks 0.3 kgs of sand each meter it is lifted.Find the work done lifting the bucket to the top of the building. B) A bucket that has a mass of 20 kg when filled with sand needs to be lifted to the top of a 25 meter tall building. You have a rope that has a mass of 0.1 kg/m that must be secured to the bucket. It takes 1 meter of rope to secure the bucket. Once the bucket reaches the top of the building it only has mass 16 kg because there was a hole in the bottom and sand was leaking out at a constant rate while it was being lifted to the top of the building.Find the work done lifting the bucket (sand and rope) to the top of the building.