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Objective: To identify the meaning of heat of formation and to use
heats of formation values for reactants and products to determine the
enthalpy change of a reaction.
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Version 2.2
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Heat of Formation
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Equations
4 Questions
Given the ∆Hf for a compound, identify chemical equations consistent
with the value.
Pick from among the three activities -
Equations, Heat of Reaction 1, and Heat of Reaction 2.
Case Studies
Completed
Student Name:
Heat of Reaction 1
3 Questions
Determine the ∆H for a reaction if given the ∆Hf values for reactants
and products. Includes simplest cases.
Law Breakers
Completed
Heat of Reaction 2
3 Questions
Determine the ∆H for a reaction if given the ∆Hf values for reactants
and products. Includes most complex cases.
Fundamentals
Completed
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You have completed the Equations activity.
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You have successfully analyzed each of the situations.
You have completed the Heat of Reaction 2 activity.
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You have completed the Heat of Reaction 1 activity.
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Equations
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Chemical Equation
#3
Test
Tap an equation to select/deselect it as an answer option. Select
all that apply.
∆H (kJ/mol)
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Activity:
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Energy
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Show ∆Hf Values
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Use the ∆H values for the steps (below) to calculate the ∆H value
for this reaction. Use the Number Pad.
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Heat of Formation
Enter the value of ∆Hrxn. Tap Check Answer button when done.
(Careful. Only 1 allowed attempt.)
Clear
∆H=
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