zakarycrane1794 zakarycrane1794

09-04-2024
Chemistry

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Which of the substances have a standard heat of formation ( ΔH°f ) of zero?
a. Cl₂ (g) at 2 atm
b. Fe at 1200 °C
c. C₂H₆ (g) at standard conditions
d. O₂(g) at 25.0°C and 1 atm

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