Interpretation:The increasing order of the given walls with respect to their diathermal property needs to be determined.
Concept Introduction:
Answer to Problem 1.1CP
Explanation of Solution
Given information: The real walls are never totally adiabatic.
An adiabatic process does not allow the transfer of heat through it. A diathermal wall can be defined as the wall separating two thermodynamic systems in which transfer of heat takes place but transfer of matter is not allowed.
Hence, the amount of heat transfer will depend on the heat capacity of the diathermal wall. In the given options, the copper wall will be more diathermal as it has the highest heat capacity compared to concrete, cork and vacuum.Whereas,the vacuum will be least diathermal due to the least heat capacity.
Thus, the increasing order of diathermal capacity is as follows:
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