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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Definitions:

Contaminant Transport

The movement of chemical substances or pollutants through the environment, affecting air, water, and soil quality.

Vegetated Zone

Areas covered with plants including grasses, trees, and shrubs, often key in preventing erosion and providing habitat.

Adsorption

The process by which atoms, ions, or molecules from a substance (it could be a gas, liquid, or dissolved solid) adhere to a surface of another substance.

Corrosion

The process of degradation of materials, especially metals, due to chemical reactions with their environment, leading to weakening and damage.