Gen Chem Matter & Energy
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Is this reaction exothermic or endothermic?
What do arrows E & B represent?
- E = Reactants
- B = Activation Energy
In terms of energy, why does a catalyst speed up a reaction?
A catalyst lowers the activation energy
Of what is temperature a measure?
On a Potential Energy Diagram, when a catalyst is added do the reactants and products change?
State the 2 conditions necessary for molecules to have Effective Collisions
Molecules must collide at the proper orientation(angle) and with enough speed/energy (force)
In terms of energy of the reactants and products, define endothermic
Products have more energy than the reactants
State the units for measuring a) heat b) temperature
- a) joules
- b) Celsius or Kelvin
What is defined as the minimum amount of energy added to the reactants in order for a reaction to occur (or get past the energy barrier)
Identify A & E
- A= activation energy of forward rxn
- E= activation energy of reverse rxn
Which letter would represent the energy barrier?
At what temperature does molecular motion or Kinetic energy cease?
Absolute zero ( O K)
2 or more elements bonded in a set ratio is a ____.
2 or more substances with no set ratio uniformly distributed is a ___.
What is the composition of this mixture?
Gas consisting of an element and a compound
An effective collision is one that ___________
forms new products OR results in a chemical reaction
Breaking a bond _________ energy and making a bond _______ energy
Breaking a bond REQUIRES energy and making a bond RELEASES energy
A catalyst can help speed up a reaction by providing an ___ _____ for the reaction.
In what layer of the Earth's atmosphere do we reside and where our weather occurs?
As altitude in the atmosphere increases, the pressure ________.
Pressure decreases because there are fewer gas molecules at higher altitude
What would you like to do?
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