AP Kinetics, structure, periodic trend, and bonding test

Which of the following is not a factor affecting the kinetics of a chemical change?

• physical state

• reactant concentration

• reactant temperature

• presence of a catalyst

• pressure with a non-constant volume

The greater that frequency of collisions and molecule interactions, ... (finish the statement that makes it true).

• the lower the reaction rate

• the higher the reaction rate

• the same reaction rate is maintained

If a lit steel wool were burned, which will burn at a faster rate once it catches fire?

Assume all scenarios involve the same mass of steel wool.

• a tight ball of steel wool

• a spread out steel wool

• it does not matter whether it is in a tight ball or spread out.

A reaction in which all reactants are of the same state or phase is called:

• homogeneous reaction

• heterogeneous reaction

As reactant concentrations increases, the frequency with which the reactant molecules collide increases, leading to increased rates. This is true of chemical changes of "zero," "first," and "second" overall reaction orders.

• true

• false

As molecules move more rapidly, they collide more frequently and with higher energy leading to increased reaction rates.

• true

• false

The greater the frequency of collisions and interactions between reactant molecules, the higher the reaction rate. For a collision or interaction between reactants to lead to a chemical reaction, it must occur with sufficient __________ with suitable ____________ for new bonds to form in the proper locations.

• pressure, color

• energy, orientation

• molarity, volume

Over time what is true of a chemical reaction which changes from reactants and changes into products?

• The concentration of reactants increases; the concentration of products decreases.

• The concentration of reactants decreases; the concentration of products increases.

• Both reactant and product concentrations stay constant.

A typical unit for reaction rate is:

• moles/min

• M/s

• mL's/ s

• molarity

What is the typical slope of a reaction curve which relates Time (s) to Reactant Concentration (M)?

• positive

• negative

• neither positive nor negative. (aka: "constant")