Enthalpy of Formation

AP Chemistry· difficulty 1/5

ΔH°_f for O₂(g) at standard state is

  • A

    Variable

  • B

    0

    check_circle
  • C

    +286 kJ/mol

  • D

    −286 kJ/mol

Explanation

Elements in their standard state have ΔH°_f = 0 by definition.

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