The maximum height (in meters) to which the car can be driven on 1.0 gallon of the fuel has to be calculated. Concept Introduction: Enthalpy (H): The total kinetic and potential energy of a system at a constant pressure. Change in enthalpy ( Δ H ): The change in heat of a system is, Δ H = Δ H f i n a l − Δ H i n i t i a l ( o r ) Δ H = H p r o d u c t s − Δ H reactants The units for enthalpy is in J o r k J p e r m o l Standard Enthalpy ( Δ H f 0 ) : Standard Enthalpies of formation ( Δ 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, P E = m g h W h e r e , m = m a s s ( k g ) , g = g r a v i t a t i o n a l a c c e l e r a t i o n ( m s − 1 ) , h = h i g h t ( m )

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Chapter 17, Problem 17.73QP

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 Introduction:

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

Change in enthalpy (ΔH): The change in heat of a system is,

ΔH= ΔHfinal− ΔHinitial (or)ΔH= Hproducts−ΔHreactants

The units for enthalpy is in J or kJ per mol

Standard Enthalpy (ΔHf0): Standard Enthalpies of formation (ΔHf0) 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,

PE= mgh Where,m= mass (kg), g= gravitational acceleration (ms−1), h= hight (m)

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