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2 cards from this section. Quick, good the night before a test.
Define standard enthalpy of formation.
Refer to the making of substances from their basic elements.
What symbol denotes standard enthalpy changes?
Think about the notation used to signify standard conditions.
What is the standard condition for pressure?
Remember the basics of the metric system.
True or False: The standard enthalpy of formation for any element in its standard state is zero.
Think about the foundational principles of formation.
Calculate the standard enthalpy change for the reaction 2 H₂(g) + O₂(g) → 2 H₂O(l) using the following values: ΔH_f°[H₂O(l)] = -285.8 kJ/mol. Why is this calculation significant in thermochemistry?
You'll apply the formation values to derive the overall reaction enthalpy.
Given the formation enthalpy values of the products and reactants, determine the standard enthalpy of reaction for the following: N₂(g) + 2 H₂(g) → 2 NH₃(g); ΔH_f°[NH₃(g)] = -45.9 kJ/mol.
Focus on ensuring the balanced equation before applying formation values.
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