Final answer:
The amount of energy represented by the arrows labeled (a), (b), and (c) are -114 kJ/mol, 30 kJ/mol, and -1055 kJ/mol, respectively.
Step-by-step explanation:
The amount of energy represented by the arrows labeled (a), (b), and (c) can be determined by the given information ΔH' = 90 kJ mol⁻¹, E = 250 kJ mol⁻¹.
(a) Arrow represents a decrease in energy, therefore it is -114 kJ/mol. (b) Arrow represents an increase in energy, so it is 30 kJ/mol. (c) Arrow represents a decrease in energy, so it is -1055 kJ/mol.