What is the reaction rate variable that causes particles to "move" faster?
What is : temperature (increase heat energy)
100
What was the reaction rate variable in the Whopper Lab when we "chewed" the candy?
What is : Crushing or surface area increase
100
What is the type of energy that causes molecular movement?
What is : Heat Energy
100
Water is present on Earth in 3 phases. When it changes phases from solid to a liquid to a gas this is a ___________change.
What is : Physical!
100
What phase of matter is present at: A to B?
What is: Solid
200
When the amount of a reactant is added to "speed up" a reaction this is changing what reaction rate variable?
What is concentration
200
In the Rate of Photosynthesis Lab the baking soda was added to water . The plant released what gas?
What is oxygen , O2
200
When particles are moving faster in a reaction they will------- more.
What is : collide or react
200
What is another word for "Phase" of matter?
What is : "State"
200
At point B to C, what is occurring?
What is : Melting
300
What are the 4 reaction rate variables we studied in class?
What are: stirring/shaking, crushing (surface area), temperature and concentration amount
300
The reaction rate of Alka Seltzer was tested in 8 trials. What was the most effective reaction rate variable to speed up explosions?
What is : heat or hot water temperature
300
What is the boiling point in Celcius of water?
What is : 100 degrees
300
When matter melts what two phases of matter are present?
What is : A solid and a liquid
300
When ice melts and becomes liquid there is a melting point. Is it, A, B, C or D?
What is : C
400
Link energy types to the reaction rate variables. Ex. Temperature is Heat E.
Crushing is: ______E, Stirring is ____ E,
Concentration is ___ E
What is: mechanical, mechanical, chemical
400
In the Rate of Photosynthesis Lab:
If you wanted bubble production in the spinach plant stem what 3 things would you do to allow and increase gas release?
What is : Add light energy, tap test tube, add more CO2
400
At what temperature does water freeze?
What is : 0 degrees Celcius
400
If water is heated up to a temp of 140 degrees. The particles(molecules) would look like?
What is : a gas, very spread apart, moving outward!
400
Between which two points is condensation occurring?
What is : E to D
500
Explain what crushing reactants does in a chemical reaction
What is : increase surface area (exposes more surface for reactant to mix)
500
Explain how the reaction rate variables of heat and stirring/shaking can increase particle collisions.
What is :
temperature = causes more collisions as more movement
stirring= forces particles to collide and react with mech E
500
Explain why reaction speed increases with more temperature added.
What is: heat energy adds more mechanical /kinetic energy to mix/react substances
500
What kind of energy conversion is occurring in the phase change graph of water
What is : Heat Energy converts to Mechanical Energy
500
In the Phase Change Graph the "x axis" can be labelled two ways. List these labels.