Unit 3 AP

Heat Content of a Substance or the

Heat Change associated with a Chemical Reaction

• Enthalpy

• Heat of Combustion

• Heat of Formation

• Bond Enthalpy

• Lattice Energy

Heat Change associated with a Chemical Reaction

This change can be Positive or Negative

• Heat of Formation

• Heat Of Combustion

• Bond Enthalpy

• Lattice Energy

• Heat of Reaction

Heat Change when 1 Mole of a Substance is Formed from its Individual Elements in their Standard States

• Heat Of Formation

• Heat Of Combustion

• Bond Enthalpy

• Lattice Energy

Heat Change Associated with the Reaction of 1 Mole of a Substance with Elemental Oxygen (O₂)

• Heat of Formation

• Heat of Combustion

• Bond Enthalpy

• Lattice Energy

Heat Change associated with the Breaking of Bonds and the Formation of Bonds given by the Equation:

ΔH_rxn= ΔH(Reactants) - ΔH(Products)

• Heat of Formation

• Heat of Combustion

• Bond Enthalpy

• Lattice Energy

The Energy Change associated with the step of the Born-Haber Cycle that adds the Gaseous Metal and Nonmetal Ions together to form the Solid Crystalline Structure Ex: Na⁺_(g) + Cl^-_(g) ------> NaCl_(s)

• Heat of Formation

• Heat of Combustion

• Bond Enthalpy

• Lattice Energy

ΔH_(rxn) can be ANY of the following except

• Heat Of Formation

• Heat of Combustion

• Bond

  Enthalpy

• Lattice Energy

The Heat of Formation of Water is Equal to -285.8 Kj/Mol

Given the Balanced Chemical Equation

2H_2(g) + 1O_2(g) -------> 2H₂O_(l)

What would be the ΔH_(rxn) and where would it be written

• 285.8 Kj/Mol written as a Product

• 285.8 Kj/Mol written as a Reactant

• 142.9 Kj/Mol written as a Reactant

• 571.6 Kj/Mol written as a Product

Select the Equation that would be an Example of a Chemical Equation where

ΔH_(rxn) Equals ΔH_(Comb) A) 2 C₂H_6(g) + 7 O_2(g) ------> 4 CO_2(g) + 6 H₂O

B) 1 C₂H_6(g) + 7/2 O_2(g) ------> 2 CO_2(g) + 3 H₂O

C) 1/2 C₂H_6(g) + 7/4 O_2(g) ------> 1 CO_2(g) + 3 /2 H₂O

• A

• B

• C

Select the Equation that would be an Example of a Chemical Equation where

ΔH_(rxn) Equals ΔH_(Form) A) 8 Fe_(s) + 6 O_2(g) ------> 4 Fe₂O_3(s)

B) 4 Fe_(s) + 3 O_2(g) ------> 2 Fe₂O_3(s)

C) 2 Fe_(s) + 3/2 O_2(g) ------> 1 Fe₂O_3(s)

• A

• B

• C