The Standard Enthalpy of Formation of Ammonia at 25 ^$\circ$ C Is -46

question 82

Multiple Choice

The standard enthalpy of formation of ammonia at 25 ^$\circ$ 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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