Question

which of the following has highest heat capacity ? 1.water. 2 air. 3.soil. 4 none of the above.

Answer 1

I think so its water

Answer 2

Answer:

1.water - has highest heat capacity

Explanation:

• Heat Capacity: The required heat for unit change in temperature of any material is called heat capacity.
• The SI unit of heat capacity is Joule/ Kelvin (J/K).
• Heat capacity is expressed as, C = dQ/ dT. Where dQ is the required heat and dT is the temperature change.
• Heat capacity = specific heat × mass. So for 1 unit mass which material will have larger specific heat that will also have larger heat capacity.

• The specific heat of water is = 4200 J/kg-K = 4.2 kJ/kg-K.

        The specific heat of air is = 1 kJ/kg-K.

         The specific heat of soil is = 1/5 th of water.

        So, specific heat of water > air > soil

                Heat capacity of water > air > soil

        ∴ Water has the highest heat capacity.