Which Substance Has a Standard Enthalpy of Formation Equal to Zero

question 3

Multiple Choice

Which substance has a standard enthalpy of formation equal to zero at 25°C?

• A)C₂H₆(g)
• B)Br₂(g)
• C)Br₂(l)
• D)Br₂(s)
• E)C₂H₆(l)

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