In a process with constant external pressure, theexpression for the largest mass that can be lifted through a height h in the surroundings needs to be determined. 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 therefore the work done will be equal to the change in the internal energy.

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Chapter 2, Problem 2.18NP

(a)

Interpretation Introduction

Interpretation:In a process with constant external pressure, theexpression for the largest mass that can be lifted through a height h in the surroundings needs to be determined.

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 therefore the work done will be equal to the change in the internal energy.

(b)

Interpretation Introduction

Interpretation: In a reversible process, the expression for the largest mass that can be lifted through a height h in the surroundings needs to be determined.

Concept Introduction: In thermodynamics, a reversible process can be defined as the process which can be reversed without 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 therefore the work done will be equal to the change in the internal energy.

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