AP Chemistrymediummcq1 pt
What does the term 'standard state' specify?
A.1 atm pressure and the most stable form at the stated temperature
B.0 °C and 1 atm
C.25 °C and 0 atm
D.The gaseous form of every element
Explanation
Core Concept
Standard conditions fix pressure (1 atm) and the reference form of each substance (graphite for C, O₂(g) for oxygen, Br₂(l) for bromine). ΔH° values use these baselines.
Correct Answer
A1 atm pressure and the most stable form at the stated temperature
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