Conduction, How much heat flows through per second?

In summary, the conversation discusses the calculation of heat flow through an iron pot on a stove. The pot has a surface area of 200 cm2 and a thickness of 2.00 mm, with a temperature of 480°C. The equation Q/t= (kt)A*(deltaT/d) is used, with thermal conductivity (kt) of 73 for iron, an area of 2m, a diameter of 0.002m, and a change in temperature of 380. However, the calculated heat flow of 27740kJ is determined to be incorrect. The question arises whether the thermal conductivity for water should be used instead of iron, or if the change in temperature is incorrect. Additionally, it is noted
  • #1
chunkytuna21
37
0
An iron pot filled with boiling water is on top of a stove. The bottom has a surface area of 200 cm2 and a thickness of 2.00 mm. If the bottom has a temperature of 480°C, how much heat flows through it per second? Answer wanted in kJ/s


Q/t= (kt)A*(deltaT/d)


The thermal conductivity (kt) for iron is 73, the area is 2m, the diameter is 0.002m, and the change in temperature is 380. So, i plug them into the equation: 73(2)*380/0.002= 27740000J which is 27740kJ. But this is the wrong answer. I already tried dividing it by 60 and that doesn't work either. Where am I going wrong? Should I use the thermal conductivity for water instead of iron or is my change in temperature wrong? I think it would be 380 because the surface is boiling water (100) and the bottom is 480.
 
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  • #2
How many cm^2 in a m^2?
 
  • #3
1cm^2= 0.0001m^2. I can't believe it was that simple. Thanks!
 

FAQ: Conduction, How much heat flows through per second?

What is conduction?

Conduction is the transfer of heat or electricity through a material without any movement of the material itself.

How does conduction work?

Conduction works by transferring energy from one particle to the next through direct contact. The particles with higher energy vibrate more and transfer their energy to particles with lower energy, resulting in an overall flow of heat.

What factors affect the rate of conduction?

The rate of conduction is affected by several factors, including the type of material, its temperature, its thickness, and the temperature difference between the two ends of the material.

How is conduction different from convection and radiation?

Conduction differs from convection and radiation in that it relies on direct contact between particles, whereas convection involves the movement of particles and radiation involves the transfer of energy through electromagnetic waves.

How is conduction measured?

Conduction is measured in units of heat flow per unit time, such as watts or BTUs per second. The rate of conduction can be calculated using the thermal conductivity of the material, its surface area, and the temperature difference between the two ends of the material.

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