3) The graph below represents the relationship between time and temperature as heat is added
at a constant rate to a sample of a substance.
Temperature
В.
Time
During interval AB which energy change occurs for the particles in this sample?
A)
The potential energy of the particles increases.
B)
The potential energy of the particles decreases.
C)
The average kinetic energy of the particles increases.
D)
The average kinetic energy of the particles decreases.

C: The average kinetic energy of the particles increases.

Explanation:

As the heat energy increases, the temperature rises and cause the

average kinetic energy of the particles increases.

But you should upload the graph that was provided with the question

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.