Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


Kinetics and nuclear

The rate of reaction must be... positive (thats why need negative sign in front of equation)
In RXn, the reactant concentration.... decreases with time because reactants are consumed
In RXn, the product concentration... increases with time because products are formed.
average rate of rxn _______ as progresses decreases
For most reactions, the rate depends on the... concentrations of the reactants
what is n in the rate law equation? the reaction order
if n = 0, ..... reaction order is zero; rate is independent of the concentration of A
if n= 1,.... reaction order is first order; rate directly proportional to concentration of A
if n=2, ..... reaction is second order; rate is proportional to the square of the concentration of A
Zero order reaction: concentration of reactant... decreases linearly with time; the rate is constant because the reaction does not slow down as the concentration of A decreases.
First order reaction: concentration of reactant... is directly proportional to the rate of reaction; rate slows down as reaction proceeds because the concentration of reactant decreases.
Second order reaction, the rate of reaction is.. proportional to the square of the concentration of the reactant; the rate is even more sensitive to reactant concentration and slope of curve flattens out more quickly than in first-order
DETERMINING THE ORDER OF A REACTION the order of a reaction can be determined only by experiment. A common way to determine reaction order is by the method of initial rates.
initial rate- the rate for a short period of time at the beginning of the reaction
in a first order reaction, the value of the rate consta,t k, can be determined by solving the rate law for k and substituting the concentration and initial rate from any of the one of three measurements
For a zero-order reaction, the initial rate is the same at all measured initial concentrations
for a second-order reaction, the initial rate ... quadruples for a doubling of the reactant concentration
the integrated rate law for a chemical reaction is a relationship between concentrations of reactants and time
the half life of a reaction(t 1/2) time required for the concentration of the reactant to fall to one-half of its initial value
half life of first order reaction: t 1/2= 0.693/ k; so, k = 0.693/ (t 1/2)
shorter half life= larger k
collision theory: how will increasing concentration affect the rate of chemical reaction? increase rate of rxn, increase # of colisions between reactant molecules
collision theory: how will increasing the temperature affect the rate of chemical reaction? increease rate of rxn, increase frequency of collisions, increase kinetic energy w/ which they collide, resulting in greaterfraction of collsions producing product
collision theory: how will addition of a catalyst affect the rate of chemical reaction? increase rate of rxn, alters rxn pathway, lower activation enerygy for new reaction pathway
Advantages of nuclear power 1) no CO2 produced 2) not dependent on foreign oil 3) a lot of energy from small amount of fuel
Disadvantages of nuclear power 1) waste is radioactive for a long time 2) accidents can release radioactivity 3) fuel could be diverted for weapons
what is a PET scan work? uses radiation, or nuclear medicine imaging, to produce 3-dimensional, color images of the functional processes within the human body. PET stands for positron emission tomography.
how does a pet scan work? The machine detects pairs of gamma rays which are emitted indirectly by a tracer (positron-emitting radionuclide) which is placed in the body on a biologically active molecule. The images are reconstructed by computer analysis
A PET scan uses __________________ that naturally emit ____________________ which interact with __________________ radioactive isotope; positrons; a nearby negatively charged electron
why is radon hazardous? it decays to 218 Po which is a solid and alpha emitter. If radon decays while in the lungs, it leaves a solid alpha-emitter behind which will continue to emit radiation
when 131/53I undergoes beta decay, it becomes.. 131/54 Xe
with beta decay, bottom number.. increases by 1
with alpha decay.. top number 4 less, bottom number 2 less
Created by: sbush0804