21. Conserve That Mass
The mass of the products must be
the same as the mass of the
reactants in the chemical reaction.
Monday, July 9, 2012
22. Conserve That Mass
The mass of the products must be
the same as the mass of the
reactants in the chemical reaction.
Atoms are never lost of created in
a chemical reaction; however they
do change partners.
Monday, July 9, 2012
30. Energy Released
Where does this energy come from?
Monday, July 9, 2012
31. Energy Released
Where does this energy come from?
You have to think about the chemical
bonds of the reactants and the
products, in order to answer this
question.
Monday, July 9, 2012
33. Energy Released
When energy is released, the products
are more stable, and their bonds have
less energy than those of the
reactants.
Monday, July 9, 2012
34. Energy Released
When energy is released, the products
are more stable, and their bonds have
less energy than those of the
reactants.
The extra energy is released in
different forms: light, sound, thermal
energy.
Monday, July 9, 2012
36. Energy Absorbed
When energy is absorbed, the
reactants are more stable, and their
bonds have less energy than those
of the products.
Monday, July 9, 2012
37. Energy Absorbed
When energy is absorbed, the
reactants are more stable, and their
bonds have less energy than those
of the products.
The extra energy needed to form
the products can be supplied in the
form of electricity, light, sound,
thermal energy.
Monday, July 9, 2012
38. Energy Released
2H2 + O2 --> 2H2O + energy
Monday, July 9, 2012
39. Energy Released
2H2 + O2 --> 2H2O + energy
2H2O + energy --> 2H2 + O2
Monday, July 9, 2012
40. Energy Released
2H2 + O2 --> 2H2O + energy
Energy Absorbed
2H2O + energy --> 2H2 + O2
Monday, July 9, 2012
41. When thermal energy is
gained or lost, special
terms are used….
Monday, July 9, 2012
42. When thermal energy is
gained or lost, special
terms are used….
Monday, July 9, 2012
43. When thermal energy is
gained or lost, special
terms are used….
Monday, July 9, 2012
44. When thermal energy is
gained or lost, special
terms are used….
Absorb Release
thermal thermal
energy energy
Monday, July 9, 2012
