Question

water is a bad conductor of heat but it becomes hot when placed over flame. name th phenomenon that takes place in this case. explain with an example

Answer 1

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If water is a bad conductor of heat, then why does it become hot?

Every substance, whether it’s a solid, liquid, or gas, has the ability to conduct/absorb heat. In other words, everything will eventually “become hot” if exposed to enough heat for enough time.

The basis for this is what’s known as “Specific Heat Capacity.” This is defined in thermodynamics as a constant (written as a capital “C”). Every substance has a value for it’s specific heat capacity. Specific Heat Capacity defines how much heat is required to raise the temperature of the substance in question by a certain amount.


All this being said, water is used to transfer heat in many applications from manufacturing, power generation, and heating your house. This is because among other fluids, water is actually a very good conductor of heat, especially given it’s cost (virtually free).

While there are downsides of using water for these sorts of applications (see: frozen pipes in the winter), we haven’t found a cheaper, more practical solution. Even fluids like glycol, which don’t freeze, are worse conductors than water and have other issues (heavier fluid to pump, corrosion of pipes, cost, etc..).

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