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Which equation represents the reaction for the standard enthalpy of formation, ∆Hf˚, for B5H9(g) at — Thermodynamics Chemistry Question

Question

Which equation represents the reaction for the standard enthalpy of formation, ∆Hf˚, for B5H9(g) at 298 K and 1 atm?

A.

5B(s) + 9H(g) → B5H9(g)

B.

2B(s) + 3BH3(g) → B5H9(g)

C.

5/2B2(g) + 9/2H2(g) → B5H9(g)

D.

5B(s) + 9/2H2(g) → B5H9(g)

✓ Correct
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