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Which of the following chemical equations corresponds to the standard molar enthalpy of formation (ΔH°f) for...

Which of the following chemical equations corresponds to the standard molar enthalpy of formation (ΔH°f) for Rb2SeO4?

2 Rb(s) + Se (s) + 2 O2(g) → Rb2SeO4 (s)

2 Rb(s) + Se(s) + 4 O(g) → Rb2SeO4 (s)

2 Rb+(aq) + SeO42-(aq) → Rb2SeO4 (s)

2 Rb+(aq) + SeO42-(aq) → Rb2SeO4 (aq)

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Answer #1

standard molar enthalpy of formation ( A Hof) of a compound is the change of enthalpy during the formation of I mole of the s

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