Question

Which of the following statements is not true about a closed cycle according to the laws of thermodynamics? Group of answer choices

Temperature, internal energy and pressure can be used to describe various the states of the system.

In a cycle, the initial and final states are the same.

No heat enters or is expelled from the system during an adiabatic leg of a cycle.

There are special processes in which heat is absorbed from a reservoir and converted competely into work.

A cycle can be run in either direction.

Answer 1

"There are special processes in which heat is absorbed from a reservoir and converted competely into work"

the above stated statement is not true according to the laws of thermodynamics because there is no such provisions of 100% efficiency in thermodynamics, no ever system has been built or modified whose efficiency is perfect 100% .

the heat absorbed from reservoir is used up as internal energy , raise in temperature and work done (including frictional losses). so it isnt possible that the heat absorbed from a reservoir is completely converted into work.

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