Answer:
C. No additional heat is required to make it occur
Step-by-step explanation:
A reaction is said to be spontaneous if it can occur on its own. Spontaneous reactions do not require additional energy or heat from other sources to occur.
A spontaneous reaction leads to an increase in the disorderliness of a system.
We can use the free energy change of a system which measures the energy of a system used to useful work to predict the spontaneity of a reaction.
If the Free energy change is negative the reaction is said to be spontaneous or feasible.