Changes
Physical Change
The end of a chemical reaction, formed from reactants.
Products
How many hydrogen atoms are in:
2H2O
4 Hydrogen Atoms
You add ice to a reaction. What will occur to the speed of the reaction?
It will slow down.
Starting a car engine.
Chemical Change
Temperature
How many Carbon atoms are in:
CO2
1 carbon atom
You heat a reaction up, making the particles move faster. What ELSE is happening to the particles in this reaction?
They are gaining energy.
Snow forming from condensation.
Physical Change
Type of change where a substance has the atoms rearranged to form a new substance.
Chemical Change
How many Oxygens are in:
NO2
2 Oxygen atoms
Temperature and kinetic energy have a _________ relationship.
Direct Relationship
Breaking a desk
Physical Change
Law of conservation of mass states....
Matter cannot be created or destroyed.
You begin a reaction with 10 grams. How many grams SHOULD you have in the products if none escapes the container?
10 grams
Reaction A is occurring at 95 degrees C, while reaction B is occurring at 75 degrees C. Which will end first if nothing else changes?
Reaction A
Digesting food
Chemical Change
The beginning of a chemical reaction, they go on to form products.
Reactants
In photosynthesis, you have 6 carbon atoms in the reactants. How many will you have in the products?
6 carbon atoms
Temperature is a measurement of....
Kinetic energy