A block of iron weighing 100 kg and having a temperature of 100°C is immersed in 50 kg of water at a temperature of 20°C. What will be the change of entropy of the combined system of iron and water? Specific heats of iron and water are 0.45 and 4.18 kJ/kg K respectively.

A block of iron weighing 100 kg and having a temperature of 100°C is immersed in 50 kg of water at a temperature of 20°C. What will be the change of entropy of the combined system of iron and water? Specific heats of iron and water are 0.45 and 4.18 kJ/kg K respectively.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: 9 7-158 An iron block of unknown mass at 85 C is dropped into an insulated tank that contains 0.02…

Q: Air compressed in a diesel engine from an initial pressure of 1 atm (14.7psia) and a temperature of…

Q: A 66-kg copper block initially at 140°C is dropped into an insulated tank that contains 90 L of…

A: The basic concept is that the total change in internal energy will be zero.

Q: Steam at a temperature of 2100C has a specific entropy of 7.1167 kJ/kg-K. Determine the pressure,…

Q: A diatomic gas in 15-L rigid container at 25 ⁰C and 4.8 atm is heated to 40 ⁰C. Determine the change…

Q: Hydrogen is stored in a tank (volume is 2.0 m) at a pressure of 500kPa and a temperature of 300K. A…

Q: 7-107 A constant-volume tank contains 5 kg of air at 100 kPa and 327°C. The air is cooled to the…

Q: Consider a quasistatic isothermal expansion of an ideal gas from Va ---> Vb at temperature Th. If…

A: Given: To determine the change in entropy of the gas for isothermal expansion process.

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

A: Given: The inner surface temperature of the brick wall is T1 = 16 °C. The outer surface temperature…

Q: total entropy

Q: 4A rigid tank initially contains 2 kg air at 200 kPa and 400°C. Later on, as a result of heat…

Q: Steam at a temperature of 240°C has a specific volume of 0.15436m³/kg. What are the pressure,…

A: At 240°C v=0.15436m³/kg Using the superheated steam table Pressure = 1.4 MPa

Q: If you know that the change in entropy of a system where heat was added is 12 J/K, and that the…

A: To Find : The amount of heat added to the system . Given : The change in entropy is ∆s=12 Jk. The…

Q: An ideal gas has a molecular mass of 25.1 kg/kgmol is heated at a constant volume from 120°C to…

Q: 900g of steam at 2000kPa fill a weighted piston-cylinder device whose volume is 0.071m3. The steam…

A: Given Data Mass of the steam is : m=900 g=0.9 kg Volume of device is :v=0.071 m3 Pressure of steam…

Q: 9.2- lbm of water at 300 psia fill a weighted pistoncylinder device whose volume is 2.5 ft. The…

Q: Air is compressed in a piston-cylinder device in a reversible isothermal process at a temperature of…

Q: heating system has a volume of 20 Land is filled with superheated water vapor at 200 kPa and 150°C.…

A: Volume of water = 20 LWater vapour pressure P1 = 200kPaWater vapour temperature T1 = 150o CSteam…

Q: water at 400 kPa

A: 9.998KJ/k

Q: K to another reservoir at 250 K. If entropy change of the hot reservoir is - 4 kJ/K, determine the…

A: given:entropy change of hot reservoir=-4kj/kT1=800KT2=250K

Q: A rigid insulated chamber of volume 2 m3 is divided into 2 equal parts by diaphram.One half of…

A: Given: The total volume of the chamber, V=2 m3 R=0.287 KJ/kg K T1=300 K P1=200 KPa

Q: A 30-kg aluminum block (specific heat = 0.973 kJ/kg K) initially at 135°C is brought into contact…

Q: 7-88 An insulated piston-cylinder device initially contains 300 L of air at 120 kPa and 17°C. Air is…

A: Initial pressure =120KpaInitial temperature =170 cHeater resistance =200 Wtime=15 minvolume=300 L

Q: A hot body at 1000K transfers 2000 kJ of heat to a body at 500K. Determine the net entropy change?…

A: Given, Temperature of hot body = T1 = 1000 K Heat transferred from hot body = Q1 = -2000 kJ…

Q: Define the system to be a container full of steam. If the steam condenses, did the system hae a…

A: Steam is a substance that is a gaseous phase of water. The steam can be generated by evaporation or…

Q: Air is compressed in a piston-cylinder device from 90 kPa and 20°C to 600 kPa in a reversible…

Q: Heat in the amount of 95kJ is transferred directly from a hot reservoir at 871 °C to a cold…

A: Given data:-The temperature of the hot reservoir (TH) = 871o CThe temperature of the cold reservoir…

Concept explainers

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

A block of iron weighing 100 kg and having a temperature of 100°C is immersed in 50 kg of water at a
temperature of 20°C. What will be the change of entropy of the combined system of iron and water?
Specific heats of iron and water are 0.45 and 4.18 kJ/kg K respectively.

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

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, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Ten cu ft of air at 30 psia and 400°F is cooled to 140°F at constant volume. What is the change in entropy ? Group of answer choices -0. 0581 Btu/oR +0. 20 Btu/oR 0 +0. 581 Btu/oR
A curious blacksmith forge 1 kg of iron then dropped it to an insulated container that contains 50 liters of water. Before dropping the iron into the insulated container, the blacksmith measures the temperature of iron and water as 500 °C and 20 °C, respectively. This curious blacksmith is always interested in thermodynamics and tries to calculate equilibrium temperature and the total entropy change because of his/her action. What will be the equilibrium temperature and the total entropy change? Is this process reversible or irreversible? (Density and specific heat of water at 20 °C are 995.10 kg/m3 and 4.16 kJ/kg.C, respectively. Assume that the specific heat capacity of iron is 0.5 kJ/kg.C)
Steam at 110.356 kPa and 140.356oC is compressed isothermally until the quality of steam is 70%. determine the change in volume, change of specific internal energy, the change of specific entropy, and heat.
Steam at 110.546 kPa and 140.546oC is compressed isothermally until the quality of steam is 70%. determine the change in volume, change of specific internal energy, the change of specific entropy, and heat.
An insulated piston–cylinder device initially contains 0.02 m3 of saturated liquid–vapor mixture of water with a quality of 0.1 at 100°C. Now some ice at –18°C is dropped into the cylinder. If the cylinder contains saturated liquid at 100°C when thermal equilibrium is established, determine the entropy generation during this process. The melting temperature and the heat of fusion of ice at atmospheric pressure are 0°C and 333.7 kJ/kg.
Help with this problem
Calculate the entropy changes that take place during processes for pure substances, incompressible substances, and ideal gases.
A thermostat-controlled 15-kW backup electric resistance heater turns on whenever necessary to keep the house at 22°C. Determine how long the electric heating system is on during this night and the amount of entropy generated during the night.
A 54-kg copper block initially at 140°C is dropped into an insulated tank that contains 90 L of water at 10°C. Determine the final equilibrium temperature and the total entropy change for this process. The specific heat of water at 25°C is cp=4.18 kJ/kg-K. The density of water is 997 kg/m³. The specific heat of copper at 27°C is cp=0.386 kJ/kg-K. 90 L Water Copper K. The final equilibrium temperature is The total entropy change during this process is KJ/K.
A thin membrane divides a rigid vessel into two equal volumes. The left side initially contains 1.5 kg water at 400 kPa and 50°C while the right side is evacuated. The membrane is now ruptured, and the water fills the entire vessel. The final pressure in the vessel is 275 kPa. Determine the change in entropy of water.