1. this graph shows the energy involved in a reaction involving two molecules. describe what is happening or what the state of the reaction is at a, b, c, and d. then tell if this is an exothermic or an endothermic reaction.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.