Question

A pipe carrying hot water experiences an external cross flow of cold air. Given steady state conditions and no heat generation, the heat flux in to the pipe wall is _________ the heat flux out of the pipe wall

A. equal to
B. greater than
C. less than
D. unrelated to

Answer 1

Under steady-state conditions with no heat generation, the heat flux into the pipe wall is equal to the heat flux out of the pipe wall, adhering to the conservation of energy principle.

Step-by-step explanation:

The equation Q = 40.00 J - 25.00 J = 15.00 J implies that, under steady-state conditions and assuming no heat generation, the amount of heat that flows from the warm water in the pipe to the colder external air (heat flux out of the pipe wall) should be equal to the amount of heat flow from the external air to the water (heat flux into the pipe wall). This is consistent with the principle of conservation of energy, which states that energy cannot be created or destroyed in an isolated system. Therefore, the heat flux into the pipe wall is equal to the heat flux out of the pipe wall.