Answered: he specific heat of water is 4.2…

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

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Similar questions

Water enclosed in a rigid tank is heated from 120°C to 250°C. The pressure is high enough that the water remains subcooled (compressed) liquid during the process. Determine the thermal energy needed for the process (in kJ) if the mass of water is 8 kg. You can use water property tables or the incompressible substance assumption.
What is the new temperature (in K) of a closed gas system when it's volume is compressed from 5.6 L to 2.3 L and initial temperature was 455ﾟ K
One kg of superheated steam is at 400 kPa and 400°C. Heat is added to raise the temperature to 500°C. Find the amount of heat needed (kJ) if: (a) The volume of the steam is kept constant during the heating. (b) The steam is allowed to expand during the heating (e.g., in a piston/cylinder system) such that the pressure is constant. Hint: The steam is not an ideal gas under these conditions.
Thermodynamics
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%.
Nitrogen in a rigid vessel is cooled by rejecting 100 kJ/kg of heat. Determine the internal energy change of the nitrogen in kJ/kg.
Consider two identical rooms, one with a 2-kW electric resistance heater and the other with three couples fast dancing. In which room will the air temperature rise more quickly?
A 752-cm sample of water was placed in a 1.00-kg aluminum pan. The inital temperature of the pan was 26°C and the final temperature of the system was 39°C. What was the initial temperature of the water?
A student living in a 4 - m 5 - m 3 - m dormitory room turns on her 100 - W fan before she leaves the room on a summer day, hoping that the room will be cooler when she comes back in the evening. Assuming all the windows are tightly closed and disregarding any heat transfer through the walls and the windows, determine the temperature in the room when she comes back 8 h later. Use specific heat values at room temperature, and assume the room to be at 100 kPa and 20 ° C in the morning when she leaves.
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.
Calculate the quantity of heat to be transferred in BTU to 3 kg of brass to raise its temperature from 26.7°C to 239.9°C. The specific heat of the brass is 0.394 kJ/kg.K.
Determine the internal energy change for carbon monoxide, in kJ/kg, as it is heated from 312° K to 1456° K, using the empirical specific heat equation as function of temperature

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he specific heat of water is 4.2 kJ/kg°C. The heat needed to warm 8 kg of water from 20°C to 70°C is