Steam expands in a turbine steadily at a rate of40,000 kg/h, entering at 8 MPa and 500C and leaving at 40kPa as saturated vapor. If the power generated by the turbineis 8.2 MW, determine the rate of entropy generation for thisprocess. Assume the surrounding medium is at 25C.

Steam expands in a turbine steadily at a rate of40,000 kg/h, entering at 8 MPa and 500C and leaving at 40kPa as saturated vapor. If the power generated by the turbineis 8.2 MW, determine the rate of entropy generation for thisprocess. Assume the surrounding medium is at 25C.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter3: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 92AP: Two moles of a monatomic ideal gas such as oxygen is compressed adiabatically and reversibly from a...

See similar textbooks

Related questions

Q: The efficiency of a Carnot's cycle is 1/5. If on reducing the temperature of the cold body by 55°C,…

Q: When 1.60×105 J of heat transfer occurs into a meat pie initially at 20.0º C , its entropy increases…

Q: A Carnot engine is operated between two heat reservoirs at temperatures 520 K and 300 K. If the…

Q: A heat source generates heat at a rate of 55.0 W (1 W=1 J/s)55.0 W (1 W=1 J/s). How much entropy…

A: Given;- A heat source generates heat at a rate of P = 55 W = 55 J/sec The surrounding temperature…

Q: At very low temperatures, the molar specific heat CV of many solids is approximately CV = AT3, where…

A: Given: CV = AT3 , where A = 3.15 × 10-5 J/mol-K4 for aluminum Temperature raised from…

Q: Two blocks, each containing 2.00 moles of silver (Cp = 25.35 Joules per kelvin per mole), are…

Q: By how much does the entropy of 1.0 kg of water change when heated from 263.15 K up to 283.15 K at a…

Q: The inner and outer surfaces of a 4-m * 10-m brickwall of thickness 20 cm are maintained at…

Q: Air expands polytropically in a piston-cylinder arrangement from an initial pressure and volume of…

Q: A 1200-W electric resistance heating element whose diameter is 0.5 cm is immersed in 40 kg of water…

Q: When 1.60×105J of heat transfer occurs into a meat pie initially at 20.0º C , its entropy increases…

A: Given quantities: heat transfer (dQ) = 1.60×105 J increase in entropy (dS) = 480 J/K initial…

Q: An elec power plant operating on the Carnot cycle puts heat into a river with a water temperature of…

Q: If you add 400 J of heat to a system so that the final temperature of the system is 200 K, what is…

Q: Does the entropy per cycle increase, decrease, or remain the same for (a) a Carnot refrigerator, (b)…

Q: The efficiency of a Carnot's cycle is 1/5. If on reducing the temperature of the cold body by 55°C,…

A: The efficiency of the Carnot engine whose initial and final temperatures are T1 and T2.The…

Q: A gas-turbine power plant operates on the simpleBrayton cycle between the pressure limits of 100 and…

Q: Evaluate the entropy of 600 g water at 25°C [specific heat capacities of ice =2090J/kg. K, Water =…

Q: Prove that the entropy of mixing of an ideal mixture has aninfinite slope, when plotted vs. x, at x…

A: The expression for the change in entropy for an ideal gas mixture, ∆Smix=-nR(xln(x)+(1-x)ln(1-x))…

Q: The compressor captures 1 m³ of air at a temperature of 293.15 K and a pressure of 1 bar and…

A: solution is given by

Q: Steam at a pressure of 0.90 MPa has an entropy of 4.9678 kJ/kg-K. What are the specific volume,…

Q: Hot combustion gases enter the nozzle of a turbojet engine at 260 kPa, 747C, and 80 m/s, and they…

A: The initial pressure, The final pressure,

Q: What is the decrease in entropy of 25.0 g of water that condenses on a bathroom mirror at a…

Q: One kilogram of water at the 1 atn boiling point (100°C) is heated until all the water vaporizes.…

A: The heat is given by H = m LV where, m is the mass and Lv is the latent heat of vaporization.

Q: A 5 kg block of ice initially at 268.15 K is placed in thermal contact with a very large reservoir…

Q: Steam enters an adiabatic turbine steadily at 7 MPa,500C, and 45 m/s, and leaves at 100 kPa and 75…

A: For the given initial pressure (p1) and temperature (T1), the initial enthalpy (h1) and the entropy…

Q: What is the entropy change involved in transforming 5 g of ice at 0C and 1 atm pressure into vapor…

Q: An ideal gas is taken through a Carnot cycle. The isothermal expansion occurs at 250°C, and the…

A: Higher temperature T1=250oC=523 K, lower temperature T2=50oC=323 K, amount of heat extracted from…

Q: What is the decrease in entropy of 25.0 g of water that condenses on a bathroom mirror at a…

A: Given data The mass of water is m=25.0 g The temperature is T=35.0 oC The latent heat of…

Q: A 67.5-kg person typically eats about 2250 kcal per day, 21.0% of which goes to mechanical energy…

Q: 3.00 moles of Ne gas irreversibly and isothermally expands from an initial volume of 4.00 final…

A: Given, the number of moles of gas, n = 3.00 moles initial volume, Vi=4.00 L final volume, Vf=17.00…

Q: Calculate the entropy of fusion of a compound at 25 °c given that its enthalpy of fusion is 36 kJ…

A: Given data Enthalpy of fusion, ΔH=36kJmol-1 Melting point Tm=1510C=273+151 K=424 K Given…

Q: VE A rigid vessel of 0.075 m3 volume contains an ideal gas, Cy = 5/2 R at 540 K and 1 bar. If heat…

Q: An inventor claims to have built an engine that produces2.00 MW of usable work while taking in 3.00…

Q: Initially 5 mol of an ideal gas, with CV,m = 12.5 J K-1 mol-1, %3D are at a volume of 5 dm3 and a…

A: Note: As per Bartleby guideline only question has to be solved at a time. Kindly upload other…

Q: A Carnot engine operates with TL=20°C and has anefficiency of 25%. By how many kelvins should the…

A: formula of efficiency of Carnot engine is as follows; η=1-TLTH…

Q: How much energy (in Joules) must be supplied to the machine to achieve this ta Sol. Since the…

A: GivenTemperature of cold site ,TC=0°C=273 KTemperature of hot site ,TH=24°C=24+273=297 KMass of…

Q: 1 mole of hydrogen gas, which has a heating heat of CP(J/mol.K) =27.17 + 3.8.10-3 T, is 2 atm and At…

A: In this question we have to find the final pressure of the gas according to the conditions given in…

Q: A freezer sustains a cold environment of -26°C and exhausts its heat at 35°C. Assuming a Carnot…

Q: A 0.20 kg/s of air are compressed isothermally from P,= 100 kPa and V,= 0.15 m³/s to P,= 700 kPa.…

Q: What is the decrease in entropy of 44.8 g of water that condenses on a bathroom mirror at a…

A: We know that∆S=∆QT 1Here∆S=Change in entropy∆Q=Heat transferT=Temperature∆Q=mLv…

Q: How much energy must be transferred as heat for a reversible isothermal expansion J. of an ideal gas…

A: Temperature (T) = 132oC Process = Isothermal Change in entropy = +46 JK

Q: A hot-water stream at 70C enters an adiabatic mixing chamber with a mass flow rate of 3.6 kg/s,…

Question

Steam expands in a turbine steadily at a rate of
40,000 kg/h, entering at 8 MPa and 500C and leaving at 40
kPa as saturated vapor. If the power generated by the turbine
is 8.2 MW, determine the rate of entropy generation for this
process. Assume the surrounding medium is at 25C.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 19 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

A Carnot cycle working between 100 and 30 is used to drive a refrigerator between 10 and 30 . How much energy must the Carnot engine produce per second so that the refrigerator is able to discard 10 J of energy per second?
Is it possible for a system to have an entropy change if it neither absorbs nor emits heat during a reversible? transition? What happens it the process is irreversible?
In an isochoric process, heat is added to 10 mol of monoatomic ideal gas whose temperature increases from 273 to 373 K. What is the entropy change of the gas?
A copper rod of cross-sectional area 5.0 cm2 and length 5.0 m conducts heat from a heat reservoir at 373 K to one at 273 K. What is the time rate of change of the universe's entropy for this process?
In a diesel engine, the fuel is ignited without a spark plug. Instead, air in a cylinder is compressed adiabatically to a temperature above the ignition temperature of the fuel; at the point of maximum compression, the fuel is injected into the cylinder. Suppose that air at 20 C is taken into the cylinder at a volume V1 and then compressed adiabatically and quasi-statically to a temperature of 600 C and a volume V2 . If =1.4 , what is the ratio V1/V2 ? (Note: static. In an operating diesel engine, the compression is not quasi-
A cylinder contains 500 g of helium at 120 atm and 20 . The valve is leaky, and all the gas slowly escapes isothermally into the atmosphere. Use the results of the preceding problem to determine the resulting change in entropy of the universe.
A 0.50-kg piece of aluminum at 250 is dropped into 1.0 kg of water at 20 . After equilibrium is reached, what is the net entropy change of the system?
A glass beaker of mass 400 g contains 500 g of water at 27 . The beaker is heated reversibly so that the temperature of the beaker and water rise gradually to 57 . Find the change in entropy of the beaker and water together.
A Carnot engine operates between 550 and 20 baths and produces 300 kJ of energy in each cycle. Find the change in entropy of the (a) hot bath and (b) cold bath, in each Carnot cycle?
A Carnot engine employs 1.5 mol of nitrogen gas as a working substance, which is considered as an ideal diatomic gas with =7.5 at the working temperatures of the engine. The Carnot cycle goes in the cycle ABCDA with AB being an isothermal expansion. The volume at points A and C of the cycle are 5.0103 m3 and 0.15 L, respectively. The engine operates between two thermal baths of temperature 500 K 300 K. (a) Find the values of volume at B and D. (b) How much heat is absorbed by the gas in the AB isothermal expansion? (c) How much work is done by the gas in the AB isothermal expansion? (d) How much heat is given up by the gas in the CD isothermal expansion? (e) How much work is done by the gas in the CD isothermal compression? (f) How much work is done by the gas in the BC adiabatic expansion? (g) How much work is done by the gas in the DA adiabatic compression? (h) Find the value of efficiency of the engine based on the net and heat input. Compare this value to the efficiency of a Carnot engine based on the temperatures of the baths.
Check Your Understanding A Carnot engine operates between reservoirs at 400 and 30 . (a) What is the efficiency of the engine? (b) If the engine does 5.0 J of work per cycle, how much heat per cycle does it absorb from the high-temperature reservoir? (c) How much heat per cycle does it exhaust to the cold-temperature reservoir? (d) What temperatures at the cold reservoir would give the minimum and maximum efficiency?
Discuss the change in entropy of a gas that expands (a) at constant temperature and (b) adiabatically.