Chapter 2, Problem 2.7P

(a)

Interpretation Introduction

Interpretation:

The molar heat capacities at constant volume of carbon dioxide gas have to be calculated.

(b)

Interpretation Introduction

Interpretation:

The molar enthalpy and molar internal energy of carbon dioxide gas has to be calculated.

Concept Introduction:

The change in enthalpy of a system can be determined as the energy transferred to the system as heat at constant pressure.

$\Delta H=q$

For a specified system, the heat transferred for any substance is given by

$q=n{C}_{p,m}\Delta T$

Where, $C_{p,m}$ is the heat capacity at constant pressure and $\Delta T=T{f}_{}-T_i$ is the temperature change in the system.

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.