What statement is true concerning the heat transfer rates through a heat exchanger boundary wall by conduction?

Question

Accepted Answer

Heat transfer rates are directly proportional to the temperature gradient across the wall and the area of the wall, and inversely proportional to the wall thickness.

Answer

Heat transfer rates are inversely proportional to the temperature gradient across the wall, and directly proportional to the area of the wall and the wall thickness.

Answer

Heat transfer rates are inversely proportional to the temperature gradient across the wall and the area of the wall, and directly proportional to the wall thickness.

Answer

Heat transfer rates are directly proportional to the temperature gradient across the wall, and inversely proportional to the area of the wall and the wall thickness.