The Standard Enthalpy of Formation of Ammonia at 25°C Is $\equiv$

question 77

Multiple Choice

The standard enthalpy of formation of ammonia at 25°C is -46.3 kJ/mol.Estimate the N-H bond enthalpy at this temperature. (Given: BE(N $\equiv$ N) =941.4 kJ/mol, BE(H-H) = 436.4 kJ/mol)

• A)360 kJ/mol
• B)383 kJ/mol
• C)391 kJ/mol
• D)459 kJ/mol
• E)475 kJ/mol

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