For the given process, the following conditions needs to be explained. ΔU surroundings < 0 but ΔT surroundings > 0 . Concept Introduction: In thermodynamics , a reversible process can be defined as the process which can be reversed to its original state. Hence in reversible processes, both the system and surroundings are returned to their initial states. In general, all reversible processes are ideal processes and cannot occur naturally. On the contrary, an irreversible process cannot come back to its initial condition. All spontaneous processes in nature are irreversible processes. In an adiabatic process, the heat change is zero, and therefore, the work done will be equal to the change in the internal energy.

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Chapter 2, Problem 2.7CP

Interpretation Introduction

Interpretation: For the given process, the following conditions needs to be explained. ΔUsurroundings< 0 but ΔTsurroundings> 0 .

Concept Introduction: In thermodynamics, a reversible process can be defined as the process which can be reversed to its original state.

Hence in reversible processes, both the system and surroundings are returned to their initial states. In general, all reversible processes are ideal processes and cannot occur naturally.

On the contrary, an irreversible process cannot come back to its initial condition. All spontaneous processes in nature are irreversible processes.

In an adiabatic process, the heat change is zero, and therefore, the work done will be equal to the change in the internal energy.

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