Chem/Phys

Question 1

does temperature affect acitivation energy?

Answer 1

temperature does NOT affect activation energy; it is lowered by enzymes. Temperature increases rxn rate by increasing kinetic energy/number of collisions.

Question 2

describe a zero-order reaction

Answer 2

reaction rate does not depend on concentration of reactants

rate law: R=k

units of rate constant: M/s

Question 3

what is the rate law and reaction order?

Answer 3

an equation that relates the reaction rate with the concentration or partial pressures of the reactants of a chemical reaction; exponenets need to be found experimentally

reaction order is the relationship between the concentrations of species and the rate of the rxn

Question 4

describe a first order reaction

Answer 4

reaction rate depends on concentration of only one of the reactants

rate law: r=k[A]

units: 1/s

Question 5

describe a second order reaction

Answer 5

the reaction rate is proportional to the square of the concentration of one reactant or the product of the concentrations of two reactants

rate law: r=k[A]² or r= k[A][B]

units: 1/(M*s)