When a carbonyl bond (C=O) absorbs 20.54 kJ/mol of energy, it jumps from low energy to a high-energy vibrational state. Calculate the longest wavelength of light that a carbonyl bond must be irradiated to bring it to the high-energy vibrational state and determine where this lies in the electromagnetic spectrum. 

• A. 5.828×10^–6 m → infrared light
• B. 5.828×10^–6 m → ultraviolet light
• C. 5.828×10^–6 m → visible light
• D. 5.828×10^–6 m → microwave

Answer: (A)