3. A room is to be heated by 1000 kg of a liquid contained in a tank placed in the room. The room is not well insulated and loses 192, 000 kJ of heat to the outside. The room is kept at a constant temperature of 20°C. If the final temperature of the liquid is 25°C, determine its initial temperature. If needed use: For the liquid Cp=4 kJ/kg.K For Air: R=0.287 kJ/kg.K C, = 0.718 kJ/kg.K 192,000 kJ C₂ = 1.005 kJ/kg.K

3. A room is to be heated by 1000 kg of a liquid contained in a tank placed in the room. The room is not well insulated and loses 192, 000 kJ of heat to the outside. The room is kept at a constant temperature of 20°C. If the final temperature of the liquid is 25°C, determine its initial temperature. If needed use: For the liquid Cp=4 kJ/kg.K For Air: R=0.287 kJ/kg.K C, = 0.718 kJ/kg.K 192,000 kJ C₂ = 1.005 kJ/kg.K

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

Similar questions

5. A 0.350 kg metal ball at an unknown initial temperature is dropped into a Styrofoam cup containing 0.400 kg of water. The initial temperature of the water is 17.0°C. The ball and the water then come to a final temperature of 28.0°C. If the metal has a specific heat capacity of 386 J/(kg-°C) and water has a specific heat capacity of 4186 J/(kg-ºC), find the initial temperature of the metal.
HELP ME WITH THIS THERMODYNAMIC PROBLEM Subcooled water at the pressure of 10 MPa and temperature of 100°C is heated at a constant pressure process to the temperature 200°C. If the mass of water is 5 kg (a closed system), determine the work and heat transfer in the process: Using compressed liquid water property table. Using saturated water property table (approximation). Using incompressible substance equations (note that in an incompressible fluid, the volume does not change).
expa 6-Five kg of steam at pressure of 4.9 bar is produced from water at 20°C. Determine the amount of heat supplied if the steam is 0.9 dry. (12263kJ) 7-One kg of water at 47.8°C is heated under constant pressure of 13.7bar until it is converted into steam with 111°C degree of superheated. Determine the quantity of heat supplied during superheating and the total heat. (268kJ, 2852kJ) Special Home Work
Could you please tell me whether 717.5 J is correct Answer or not (Don't copy ,Incase if you are unsure just skip it . I am confused with value ∆T ) Question 1: Consider a piston–cylinder device that contains 0.5 kg air. Now, heat is transferred to the air at constant pressure and the air temperature increases by 5°C. Determine the expansion work done during this process.
It is insulated against heat, except for a cylinder base B with a volume of 100 liters. This cylinder It is divided into two compartments by a heat-proof and frictionless piston. 100 kPa pressure in chamber A and air at 20 oC temperature, and neon gas at 30 oC in compartment B. Initially the volumes of both compartments are equal. Compartment A at 800 kPa and 20 oC inside it is connected to a pipe with air flow. The valve opens and when the pressure in chamber A reaches 800 kPa is closed. In compartment B, neon gas is inverted and the temperature changes in a steady state. ww A) NEON'S FİNAL VOLUME AND COMPRESSİON WORK B) THE TEMPERATURE AND MASS OF THE AİR İN THE FİNAL CHAMBER A ww ww c) CALCULATE THE TOTAL ENTROPY CHANGE OF THE ENTİRE SYSTEM. A B ► Air
A 110-volt 6 Ampere electric heatrer is submerged in 1 kg of water for 24 minutes. What will be the final temperature of the water if its initial temperature is 23 C. Assume a heat loss of 13%.
Shown in the figure, an insulated rigid tank is divided into two equal parts by a partition. Initially, one part contains an indeal gas, and the other part is evacuated. The partition is then removed, and the gas expands into the entire tank. At the initial state, the mass of the gas is m= 4.00kg, initial pressure is p1 = 600.00 kPa, initial temperature is T1 = 300.00 K. The gas constant is R = 0.2870 kJ/(kg·K). (The internal energy can be determined by the equation ΔU=m·cv·(T2-T1), where cv = 0.7180 kJ/(kg·K) is the specific heat at the constant volume.) Calculate the final state temperature T2.__________ (K)
During processing in a steel mill, a 900 lb steel casting at 800°F is quenched by plunging it into a 550 gal oil bath, which is initially at a temperature of 100°F. After the casting cools and the oil bath warms, what is the final temperature of the two? The weight per unit volume of the oil is 7.5 lb/gal. (Express your answer using four significant figures.) T F
Shown in the figure, an insulated rigid tank is divided into two equal parts by a partition. Initially, one part contains an indeal gas, and the other part is evacuated. The partition is then removed, and the gas expands into the entire tank. At the initial state, the mass of the gas is m= 4.00kg, initial pressure is p1 = 600.00 kPa, initial temperature is T1 = 300.00 K. The gas constant is R = 0.2870 kJ/(kg·K). (The internal energy can be determined by the equation ΔU=m·cv·(T2-T1), where cv = 0.7180 kJ/(kg·K) is the specific heat at the constant volume.) Calculate the final state pressure p2.__________ (kPa)
answer d
A copper container of mass 0.080 kg and specific heat 387 Jkg-1 K-1 contains 0.30 kg of water and 0.040 kg of ice at 0˚C. Steam at 100˚C is passed into the water and its temperature stabilizes at 20.0˚C. Find the mass of the water left in the container. Assume the system is insulated from its environment.
1.5 kg of gas at 20°C is contained in a cylinder and heated to 75°C while the volume remains constant. Calculate the heat energy supplied if c, = 700 J/kgK.