Question

write the first law of thermodynamics apply this law to obtain expression for adiabatic process
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Answer 1

• The first law of thermodynamics states that "Energy can neither be created nor be destroyed but it can only be changed from one form to another."
• The mathematical expression for the first law of thermodynamics is as follows:- ΔU = q + W ( where ΔU is the change in internal energy, q is the amount of heat and W is the work done)
• For an adiabatic process, the heat content of the system remains constant. Since there is no change in heat, q = 0, Hence, ΔU = Wad.
• Hence, work done in an adiabatic process is equal to the amount of change in internal energy.