Calculate the Electron Affinity for the Formation of the Hydride

question 80

Multiple Choice

Calculate the electron affinity for the formation of the hydride ion from the following information: H(g) + e^- → H^-(g) ?
1/2 H₂(g) → H(g) +217.9 kJ/mol
Na(s) → Na(g) +107.3 kJ/mol
Na(g) → Na⁺(g) + e^- +495.8 kJ/mol
Na(s) + 1/2 H₂(g) → NaH(s) -60.0 kJ/mol
NaH(s) → Na⁺(g) + H^-(g) +810.9 kJ/mol

• A)-50.1 kJ/mol
• B)-70.1 kJ/mol
• C)-816 kJ/mol
• D)-1632 kJ/mol

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