Energy Changes in Chemical and Nuclear Reactions

Question	Answer
Thermochemistry	the study of energy changes during physical or chemical changes in matter
energy SI unit	the ability to do work J Joules
Work SI Unit	The energy transferred to an object by a force that causes the object to move
Potential Energy	the energy due to its position or composition of the object
Kinetic Energy	the energy of motion
thermal energy	the total quantity of kinetic and potential energy in a substance
heat	the transfer of thermal energy from a warm object to a cooler object
temperature	a measure of a the average kinetic energy of entities in a substance
chemical system	a group of reactants and products being studied
surroundings	all the matter that is not part of the system
open system	all energy or molecules can leave and go as they please
closed system	can exchange energy but no matter with its surrounding
isolated system	neither matter nor energy can move into or out of the system
exothermic	releasing energy to the surrounding
endothermic	absorbing energy from the surroundings
fusion	combining two or more nuclei of low atomic mass to form a heavier, more stable nucleus
fission	using a neutron to split a nucleus of high atomic mass into two nuclei with smaller masses

Resource summary

	Created by Vita Mishtii over 10 years ago