Chapter 18, Problem 18.71QP

Interpretation Introduction

Interpretation:

The maximum height (in meters) to which the car can be driven on 1.0 gallon of the fuel has to be calculated.

Concept Information:

Enthalpy (H): The total kinetic and potential energy of a system at a constant pressure.

Change in enthalpy ($\Delta H$): The change in heat of a system is,

$\begin{array}{l}\Delta H=\Delta H_{final}-\Delta H_{initial}\\ (or)\\ \Delta H=H_{products}-\Delta H_{\text{reactants}}\end{array}$

The units for enthalpy is in $JorkJpermol$

Standard Enthalpy $(\Delta H_f^0)$: Standard Enthalpies of formation $(\Delta H_f^0)$ are defined as the enthalpy change for the formation of one mole of a given compound from its constituent elements in their standard states.

Spontaneous process: A process which is initiated by itself, without the help of external energy source is called spontaneous process.  All spontaneous process is associated with the decrease in free energy in the system.

Kinetic energy: The energy of motion, if something is moving it has kinetic energy.

Potential energy: Potential energy is energy possesses by an object due to its position state.

Potential energy formula is,

$\begin{array}{l}PE=mgh\\ Where,\\ m=mass(kg),g=gravitationalacceleration(m{s}^{-1}),h=hight(m)\end{array}$