Fill in the blanks A reaction possesses a free energy of -5.45 kcal/mol, therefore this reaction can be classified as:

Fill in the blanks 

A reaction  possesses a free energy of -5.45 kcal/mol, therefore this reaction can be classified as:________________

When measuring the free energy of a system,  it is found that the ΔG is 0 kcal/mol. What can be determined from this statement?

Explain why ATP is abundant in energy.