Question

________ is concerned with whether a reaction will proceed as it is written.

__________ is concerned with the speed by which a reaction occurs.

Reaction rate is generally measured in ____________.

A reaction can only be monitored for rate if _________ are measurable.

For a generic reaction aA + bB --> cC + dD, the rate of appearance of D is ____________.

Rate can be expressed as change in _________ with respect to time.

For the reaction below, if NO2 forms at 0.0072 M/s, the rate of O2 formation of is ____________. 2 N2O5(g) --> 4 NO2(g) + O2(g).

we can plot _________ from the negative of the slope of a graph at t=0.

On a concentration graph, the slope of the line tangent to the curve at any point is the ___________.

__________ can affect the rate of a reaction.

answers:

A. spontaneity

B. kinetics

C. M/s

D. the products or reactants

E. (1/d) x (Δ[D]/Δt)

F. concentration

G. 0.0018 M/s

H. initial rate

I. instantaneous rate

J. The nature of the reactants

K. m/s

L. - (1/d) x (Δ[D]/Δt)

M. (Δ[D]/Δt)

N. 0.0036 M/s

O. controlled rate

Answer 1

A. Spontaneity. Whether or not a reaction would occur as is written by a chemical reaction scheme is determined by thermodynamic parameters such as the relative enthalpies, Gibbs energies etc. of the reactants and products. A reaction is said to be spontaneous if the change in Gibbs energy is negative.

B. Kinetics- Kinetics predicts the rate at which the reactions proceed; i.e., the rate at which the reactants are converted to products.

C. Reaction rates are usually measured as change in concentration of the reactants or products with time. Hence, molar concetration per time is the unit.

D. The reaction rates can only be found out if and only if the reactants or products are measurable and the change in their concentrations with time are measured.