Where does the heat from a furnace go?
The heat of the furnace is transferred to the air in ducts, which rise to rooms above where the hot air is emitted through registers. The warm air from a furnace, being lighter than the cooler air around it, can be carried by gravity in ducts to the rooms, and until about 1930 this was the usual method employed.
Which is true of the rate of heat transfer?
Explanation: Greater the temperature imbalance the higher would be the rate of energy transfer. 3. An oil cooler in a high performance engine has an outside surface area 0.12 m2 and a surface temperature of 65 degree Celsius.
Which is the smallest degree of approach for heat transfer?
LMTD in case of counter flow heat exchanger as compared to parallel flow heat exchanger is 23. The transfer of heat by molecular collision is smallest in 24. In heat exchangers, degree of approach is defined as the difference between temperatures of 25. In a shell and tube heat exchanger, baffles are provided on the shell side to 26.
When is heat transferred from one body to another?
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by (e) convection and radiation. 37. When heat is transferred form hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by
Where does the heat come from in the stratosphere?
The direct heat source for the stratosphere is the Sun. Air in the stratosphere is stable because warmer, less dense air sits over cooler, denser air. As a result, there is little mixing of air within the layer. The ozone layer is found within the stratosphere between 15 to 30 km (9 to 19 miles) altitude.
Why is the temperature higher near the surface of the atmosphere?
Rock, soil, and water on Earth absorb the Sun’s light and radiate it back into the atmosphere as heat. The temperature is also higher near the surface because of the greater density of gases. The higher gravity causes the temperature to rise. Notice that in the troposphere warmer air is beneath cooler air.
Which is the standard definition of heat of formation?
The standard heat of formation is defined as the amount of heat absorbed or evolved at 25° C (77° F) and at one atmosphere pressure when one mole of a compound is formed from its constituent elements, each substance being in its normal physical state (gas, liquid, or solid).
Is the body temperature a balance between heat loss and heat gain?
Body temperature is a balance between heat loss and heat gain. During exercise, body temperature is regulated by making adjustments in the amount of heat that is lost. a. true b. false a. true