Section 4 Flashcards
What is chemical energy?
The energy stored in chemical bonds between atoms
What is thermal energy?
Energy of the motion of all the particles an object naturally flows from
What is an endothermic change?
Change which energy is stored
What is an exothermic change?
Change which energy is released
What is temperature?
The measurement of how hot/cold it is
What is the law of conservation of mass?
The fact that matter is neither created/destroyed during chemical/physical change
What is a chemical change?
Change that alters chemical substance, forming a new substance
What is a physical change?
Change that only alters appearance
What are the three states of matter?
Solid/Liquid/Gas
Give 3 examples of physical change.
dissolving, bending, crushing
Chemical changes produce new substances with…
new/ different properties.
Every chemical/physical change includes a change in…
energy.
What happens to energy during a chemical change?
Energy is conserved
Is there such thing as cold? Why/why not?
No because energy is not created/destroyed only transformed from one another
