Can someone help me solve this?

Phase changes are chemical changes. true or false

What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative