Potential Energy Diagrams

Potential Energy Diagrams

By NAUDIA LAWRENCE

Knowing how to use the regents chemistry reference tables can be a big help during the exam​

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ReferenceTables

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Table I shows us the heat of reaction values and gives us valuable information

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Table I

Heat of Reactions​

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​101.3 kPa and 298 K is just standard conditions or normal conditions

Look at the Title

Reactions on the left

∆H or Delta H on the right

What's on the Table

This is THE HEAT OF REACTiON

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That is the amount of energy released or absorbed by the ​reaction as it moves forward

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Delta H

This is THE HEAT OF REACTiON

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All types of reactions absorb or release energy

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ENDO = ENTER

EXO = EXIT​

How ro tell the difference between endothermic and exothemic reactions

Table I shows us the heat of reaction values and gives us valuable information

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Table I

Heat of Reactions​

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Reveiw types of reactions

What do these reactions have in common?

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Combustion

Reaction

Synthesis (combination) Reactions

Synthesis (combination) Reactions

Solubility Reactions (Solid dissolved in water)

Lets look at how to use Table I to answer Questions

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Remeber:

Exothermic means heat is released​

This means -ve ​∆H

Hint on the bottom of table I​

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Multiple Choice

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Multiple Choice

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Multiple Choice

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Multiple Choice

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These diagrams helps us determine if a reaction is Endothermic or

Exothermic​

Potential Enegy Diagrams

ENDO = ENTER

EXO = EXIT​

How ro tell the difference between endo thermic and exothemic reactions

ENDO = ENTER

EXO = EXIT​

How ro tell the difference between endo thermic and exothemic reactions

1. Look at the location of reactanta and Products

2. What is the potential energy of the reactants and Products

3. UPHILL is ENDOTHERMIC

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What type of reaction?

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1. Look at the location of reactanta and Products

2. What is the potential energy of the reactants and Products

3. DOWNHILL is EXOTHERMIC

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What type of reaction?

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This is the unstable combonation of atoms fromed before the products are made

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​Activated Complex

Each Letter represent the potential enegy of the different parts of the reaction

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Labeling a Potential Energy Diagram

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Each Letter represent the potential enegy of the different parts of the reaction

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Labeling a Potential Energy Diagram

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