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astraxan [27]
2 years ago
12

A thickness of a material is a factor that affects heat conductivity. Does heat flow faster through a thick or a thin piece of t

he same material?
The surface area of a material is a factor that affects heat conductivity. Does heat flow faster through a large surface area or through a small surface area? Why? (Hint: Think about the number of particles available to bump into one another).


Change in temperature is a factor that affects heat conductivity. Will heat flow faster when there’s a large change in temperature or a small change in temperature?
Chemistry
2 answers:
Alex73 [517]2 years ago
7 0
1.) <span>The speed that the heat is conducted through the material is the same for a given thickness. If it takes 0.1 second to increase 5 degrees, if the material is 5 times thicker, it will take 5 times as long... so the rate is the same for the same given distance

2.)???

3.)</span>
<span>electron6.phys.utk.edu/101/CH7/Heat%20Flow.htm
</span>
Arada [10]2 years ago
4 0

Answer:

1. Heat flows faster through a thin material.

2. Heat flows through a large surface area.

3. Heat flows faster for a large change in temperature.

Explanation:

Thinking process:

Newton's law of cooling or heat transfer is given by the following equation:

Q= kA\delta T

Where Q = Heat change (J)

A = area of hear transfer (m²)

\fdelta\delta T = Change in temperature.

However, for a temperature difference across the wall having a thickness "x"and  a constant surface area A, we get,

Q= k.A\frac{T_{1} - T_{2} }{x}

Where x = thickness of the material

As we can see, increasing the thickness, x, decreases the heat flux

Increasing the area, A increases the heat flux

A big temperature increase, ΔT results in a large heat transfer.

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