Reactions and Changes (Exothermic Reaction (release energy (more than…
Reactions and Changes
more than needed to break bonds
energy=0-can create product
product-hotter than reactants!
example: Fireworks !
Reactants -- products + energy
Energy for breaking bonds > Making Bonds Energy
Energy used from surroundings
Less energy is released
Usually in form of heat
Endothermic means- "Taking In heat"
properties may change
Substance item/object/matter stays same
matter changes into different substance
Mass is conserved
5 ways to spot chemical changes
Change in color
Gas is made
New/ Different properties
Period 2 Tres Interesante Quarks
Naina Kalra #216
Nyla Zia #234
Divya Ramaswamy # 231