If the exposed ends of the two rods in question 5 are kept at 0oC and 52oC

Question

What is the rate of heat conduction across both rods due to the temperature difference between the ends given the cross-sectional area of the rods to be 0.010m²?

Answer: _____ W

Answer 1

In order to answer this you need to use the equation for heat transfer via conduction (as opposed to heat transfer via convection or radiation). You can use the following equation.

P = kA(T_H-T_C)/L

P = rate of heat transfer measured in Watts (This is what were looking for)(

k = thermal conductivity of the material. This is a property of the material and has units W*m^-1*k^-1

A = cross-sectional area in m² = 0.010m²

T_H = Hot temp in degrees (C or K, doesn't matter) = 52 degrees

T_C = Cold temp in degrees (C or K, doesn't matter) = 0 degrees

L = length in meters = unknown

It looks like you're missing the length of the bars and the thermal conductivity of the material. Was there any other information given? The length should have been provided to you as well as the material the bars are made out of. If you know the material, you can find its thermal conductivity value online or in a textbook.

I hope this helps. If you have any questions please feel free to reach out.