Question

Water is used for the internal heat of building because ( ) 1.It has highest specific heat
2.its temperature does not rise above 100°C
3.It is cheapest and easily available
4.All the above

Answer 1

Answer:

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Explanation:

2 Thermal Capacity

Thermal capacity is the property of a material to absorb heat when it is heated and to release heat when it is cooled. It is defined by:

(2.15)

or

(2.16)

In this formula: Q is the heat absorbed or released by a material (J);

      m is the mass of a material (g);

      C is the specific heat of a material [J/(g∙K)];

      T2 –T1 is the temperature difference before and after heating or cooling (K).

The specific heat, also called specific heat capacity, is the measure of the heat energy that a substance in a unit quality absorbs or releases when the temperature increases or decreases 1 K. The bigger the specific heat is, the better the stability of the indoor temperature will be.

Thermal conductivity coefficient and specific heat should be known when thermal calculations are conducted to buildings.