Enthalpies of Formation
Study Guide Overview
This study guide covers standard enthalpy of formation (ΔHf), including its definition, standard conditions, and the significance of zero ΔHf for elements in their standard states. It explains how to calculate ΔHrxn using the formula ΔHrxn = ΣnΔHf(products) - ΣmΔHf(reactants), with examples and common mistakes to avoid. It includes an AP-style practice question on enthalpy of combustion and concludes with final exam focus, key takeaways, common question types, and last-minute tips.
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Question 1 of 7
What is the standard enthalpy of formation (ΔHf) defined as? 🤔
The enthalpy change when any amount of a compound is formed
The enthalpy change when one mole of a compound is formed from its elements in their most stable state at standard conditions
The enthalpy change when any amount of a compound is formed at any conditions
The enthalpy change when one mole of a compound is formed at any conditions