Vocabulary
Scientific way to represent Molecules/Compounds. Includes what type and number of atoms in molecule (i.e. H2O, NaCl, CO2, C6H12O6, etc)
Chemical Formula
H2 + O2 → H2O
2H2 + O2 → 2H2O
State of matter where particles have definite shape and definite volume. Particles are at lowest kinetic energy at this state
Solid
Elements or Compounds which exist prior/ BEFORE (LEFT SIDE) of a chemical equation
Reactants
This subatomic particle has a positive charge
protons
Type Mixture that has Same composition throughout. (When split, each sample looks identical). (i.e air)
Homogeneous Mixture
KClO3 → KCl + O2
2KClO3 → 2KCl + 3O2
A change from one state of matter (solid, liquid, or gas) to another without a change in chemical composition. PHYSICAL CHANGE
Phase Change
Total amount of mass of the reactants is 100 grams, what must the mass of the products be?
100 grams
This subatomic particle is located in the nucleus and has no charge
Neutrons
A type of pure substance that cannot be broken down into any other substance by physical or chemical means. MADE UP OF ONLY ONE TYPE OF ATOM
Element
C2H4 + O2 → CO2 + H2O
C2H4 + 3O2 → 2 CO2 + 2H2O
Explain the reason that water in solid state (ice) floats on top water in liquid state
It has a lower density, this makes water unique.
I have two reactants. One reactant is 35 grams, the other is 45. What is the total mass of the products?
80 grams
What makes every atom unique? How do I know an oxygen atom is an oxygen atom and not a hydrogen atom?
Atomic number (# of protons)
Total amount of kinetic and potential energy of the particles in a substance/object
Thermal Energy
CO2 + H2O → C2H5OH + O2
2 CO2 + 3 H2O → C2H5OH + 3 O2
When the temperature is not increasing in the graph, but we have thermal energy being applied to the system. What is the main form the thermal energy is in?
Potential energy
I have two reactants. One reactant has a mass of 50 grams, the other has a mass of 40 grams. They produce two products. One product has a mass of 30 grams. What is the mass of the other product?
60 grams
What subatomic particle is the most important for determining chemical reactivity?
Electrons
Matter (atoms) can neither be created nor destroyed. Atoms can only be rearranged through chemical reactions.
Law of Conservation of Mass
N2 + H2O → NH3 + NO
5 N2 + 6H2O → 4NH3 + 6NO
How is it possible that a an iceberg can have more thermal energy but a lower temperature than a cup of coffee
thermal energy is dependent on amount of substance as it is total potential and kinetic energy.
Explain how law of conservation of mass (matter) and energy work together in a chemical reaction
Teacher will judge
How come if most of all matter in universe is empty space? We don't just pass through all matter like ghosts
Teacher