Apentix/AP Chemistry/Unit 6: Thermodynamics/Question
AP Chemistrymediummcq1 pt

Which statement about enthalpy of formation reactions is correct?

A.They form one mole of product from elements in standard states
B.They can use any reactant forms
C.They form two moles of product
D.They always release energy

Explanation

Core Concept

The definition fixes both the amount (1 mol) and the reactant forms (standard states), making ΔH°_f tables consistent worldwide.

Correct Answer

AThey form one mole of product from elements in standard states

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