Questions tagged [thermal-conductivity]

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Thermal conductivity and diffusivity of diatomite (also known as diatomaceous earth or kieselguhr)

Does anyone know where can I find measured thermal conductivity and thermal diffusivity of diatomite for different temperatures? I'm looking for the temperature dependency for temperatures higher than ...
169 views

Possible error in textbook question? (Heat transfer)

I am dealing with either (a) a severe misunderstanding of the question, or (b) a wrong textbook answer. Here is question verbatim: A jacketed vessel is used to heat a water stream using steam ...
1 vote
56 views

IAPWS-IF97 empirical equations for water and steam

IAPWS-IF97 provides empirical equation the dynamic viscosity and the thermal conductivity for water, are there any formulas by IAPWS-IF97 for the density and the specific heat capacity of water? I ...
• 133
415 views

Can a thin stainless steel plate warping and unwarping in a gas oven due to temperature gradients break at some point?

This is in continuation of a previous question: I have a specially cut 316 stainless steel plate, 345mm diameter * 2mm thicknesses, used in a butane pizza oven that can reach 500 degrees Celsius as a ...
• 147
1 vote
997 views

Effect of specific heat capacity on heat loss

Assume we want to calculate the heat capacities of two substances with different heat capacities. We heat them both up with an immersion heater delivering a constant rate of energy (constant J/s), and ...
1 vote
110 views

Crucible design for melting alumina

I'd like to melt alumina in a slow, controlled manner. So I thought a graphite crucible with a tungsten wire wrapped around it for heating would be a good start. To reduce heat losses, I put that ...
20 views

Difference in collision cross-section obtained by measurement method

I have a simple question of Physical Chemistry, but I don't know the answer. We can find collision cross-section(σ) through experiments in three ways. first, diffusion flux experiment. diffusion ...
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908 views

Electrical and Thermal conductivity of electrum alloys

I have tried to search for this to little effect - I am trying to find electrical and thermal conductivity values for Electrum (a gold and silver alloy). Most sites mention the values depend on the ...
• 113
70 views

VO2 unexpected conduction [closed]

$\ce{VO2}$ is a weird metal which becomes a conductor at temperatures higher than $\pu{67 ^\circ C}$, but below $\pu{67 ^\circ C}$, it is an insulator! How is this possible anyway? This is against ...
• 1
381 views

Electrical and thermal conductivity of graphite

I was reading about carbon family where it was mentioned that electrical conductivity of graphite increases with temperature while thermal conductivity decreases. However, I could not find a suitable ...
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