Question

Immediately, at once (Ara mateix)

a. Gradually
b. Spontaneously
c. Eventually
d. Simultaneously

Answer 1

A spontaneous reaction releases free energy and moves to a more stable state. Instantaneous reactions occur rapidly with sudden release of energy.

Step-by-step explanation:

A spontaneous reaction is one which releases free energy and moves to a more stable state. Instantaneous reactions occur rapidly with sudden release of energy.