A room is heated by a baseboard resistance heater. When the heat losses from the room on a winter day amount to 7000?kJ/h, it is observed that the air temperature in the room remains constant even though the heater operates continuously. Determine the power rating of the heater in kW.
What will be an ideal response?
It is observed that the air temperature in a room heated by electric baseboard heaters remains constant even though the heater operates continuously when the heat losses from the room amount to 7000 kJ/h. The power rating of the heater is to be determined.
Assumptions 1 Air is an ideal gas since it is at a high temperature and low pressure relative to its critical point values of -141°C and 3.77 MPa. 2 The kinetic and potential energy changes are negligible, 
The temperature of the room remains constant during this process.
Analysis We take the room as the system. The energy balance in this case reduces to
You might also like to view...
Fluency in Spanish is highly recommended because of the growing number of Hispanic employees in the turfgrass industry
Indicate whether the statement is true or false
American cities increasingly abandoned wooden construction for brick and steel in their downtown districts after
A. the great Chicago fire of 1871. B. the development of the electric elevator and the skyscraper. C. brickmaking became cheaper and iron was superseded by more durable steel for construction purposes. D. the cost of brick and steel dropped markedly in the 1870s. E. wooden tenements collapsed in the New York inner city in the 1880s.
The ____ is the basic building block of the universe.
a. proton b. electron c. atom d. molecule
Use the accompanying figure. Calculate the sales tax to the nearest cent.
A. $6.10 B. $6.20 C. $6.60 D. $6.95