Question

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Answer 1

A) an adiabatic process is a type of thermodynamic process which occurs without transferring heat or mass between the system and its surroundings. Unlike an isothermal process, an adiabatic process transfers energy to the surroundings only as work.[1][2] It also conceptually supports the theory used to explain the first law of thermodynamics and is therefore a key thermodynamic concept.

B) the wall is thermally conducting

ΔU= (exothermic process)

C) In thermodynamics, work is the quantity of energy transferred from one system to another without an accompanying transfer of entropy.

Here, q=0 and hence ΔU=W

So,the wall given is adiabatic.