Chapter 2, Problem 2C.1ST

(a)

Interpretation Introduction

Interpretation:

The change in internal energy when $10kJ$ of work is done on a system has to be determined.

Concept Introduction:

The internal energy, U is the sum of kinetic energy and the potential energy inside the system.

Change in internal energy, $\text{ΔU}$, is the measures of energy that is transferred as heat and work from the system or to the system.

  $\text{ΔU}\text{=}\text{q}\text{+}\text{w}$

Where $\text{q}$ is the heat energy absorbed or released, $w$  is the work done to the system or from the system.

  $w= \text{-P(ΔV)}$

Where,

  $\text{ΔV}$ is the change in volume, and P is the pressure.

(b)

Interpretation Introduction

Interpretation:

The change in internal energy when $15kJ$ of energy is supplied to a system that does  $10kJ$ of work has to be determined.

Concept Introduction:

The internal energy, U is the sum of kinetic energy and the potential energy inside the system.

Change in internal energy, $\text{ΔU}$, is the measures of energy that is transferred as heat and work from the system or to the system.

  $\text{ΔU}\text{=}\text{q}\text{+}\text{w}$

Where $\text{q}$ is the heat energy absorbed or released, $w$  is the work done to the system or from the system.

  $w= \text{-P(ΔV)}$

Where,

  $\text{ΔV}$ is the change in volume, and P is the pressure.