Question 1

What is the rate equation of a reaction A + B $\rightarrow$ C which has a first-rate order for [A] and zero-rate order for [B]? &#10;A) rate = k[A]&#10;B) rate = k[A][B]&#10;C) rate = k[B]

Accepted Answer

The rate equation for a reaction that is first order with respect to [A] and zero order with respect to [B] is given by rate = k[A]. This is because the rate of reaction depends on the concentration of A to the first power and is independent of the concentration of B.

Question 2

What is the overall rate order of a reaction A + B $\rightarrow$  C which has the following rate equation: rate = k[A][B]? &#10;A) 2&#10;B) 1&#10;C) 0

Accepted Answer

The overall rate order is the sum of the exponents in the rate equation, which is 1 (for [A]) + 1 (for [B]) = 2.

Question 3

What affect does temperature have on the rate of a reaction? Outcome # 6) DOK 2)&#10;A) the lower the temperature, the lower the kinetic energy which results in more effective collisions therefore increasing the rate of a reaction&#10;B) the higher the temperature, the greater the kinetic energy which results in more effective collisions therefore increasing the rate of a reaction&#10;C) the higher the temperature, the greater the kinetic energy which results in more effective collisions therefore decreasing the rate of a reaction

Accepted Answer

The higher the temperature, the greater the kinetic energy of the molecules involved in the reaction. This increase in kinetic energy leads to more frequent and more effective collisions between reactant molecules, thereby increasing the rate of the reaction.

Question 4

What is the rate order with respect to [B] in the reaction A + B $\rightarrow$  C which has following rate equation: rate = k[B]? &#10;A) 2&#10;B) 1&#10;C) 0

Accepted Answer

The rate equation given is rate = k[B], which indicates that the rate of the reaction is directly proportional to the concentration of B raised to the first power. Therefore, the rate order with respect to [B] is 1.

Question 5

What is the rate order with respect to [A] in the reaction A + B $\rightarrow$  C which has following rate equation: rate = k[B]? &#10;A) 2&#10;B) 1&#10;C) 0

Accepted Answer

The rate equation given is rate = k[B], which indicates that the rate of reaction is independent of the concentration of A. Therefore, the rate order with respect to [A] is 0.

Question 6

Which of the following affects the rate of a reaction? Outcome # 6) DOK 1)&#10;A) concentration, temperature, nature of reactants, presence of solvents&#10;B) concentration, temperature, molecular size, presence of catalysts&#10;C) concentration, temperature, nature of reactants, presence of catalysts

Accepted Answer

The rate of a reaction is influenced by several factors including the concentration of reactants (as it affects the frequency of particle collisions), temperature (which increases kinetic energy and thus collision frequency and energy), the nature of the reactants (different substances react at different rates), and the presence of catalysts (which lower the activation energy needed for the reaction to proceed).

Question 7

A reaction where the products are higher in energy than the reactants is an example of an _____. Outcome # 6) DOK 1)&#10;A) endothermic process&#10;B) exothermic process&#10;C) exergonic process

Accepted Answer

An endothermic process absorbs energy from its surroundings, resulting in products that are higher in energy than the reactants.

Question 8

A reaction where the products are lower in energy than the reactants is an example of an _____. Outcome # 6) DOK 1)&#10;A) endothermic process&#10;B) exothermic process&#10;C) endergonic process

Accepted Answer

An exothermic process is one in which the products are lower in energy than the reactants, releasing energy to the surroundings, typically in the form of heat.

Question 9

Which statement best describes the effect of concentration on the rate of a reaction? Outcome # 6) DOK 2)&#10;A) higher concentrations result in more effective collisions therefore increasing the rate of a reaction&#10;B) higher concentrations result in less effective collisions therefore increasing the rate of a reaction&#10;C) higher concentrations result in more collisions therefore increasing the rate of a reaction

Accepted Answer

Higher concentrations lead to more effective collisions because there are more reactant particles in a given volume, increasing the likelihood of collisions that result in a reaction.

Question 10

_____ energy is the minimum amount of energy that colliding molecules must possess in order for a chemical reaction to occur. Outcome # 6) DOK 1)&#10;A) activation&#10;B) bond&#10;C) collision

Accepted Answer

Activation energy is the minimum amount of energy required for reactants to transform into products in a chemical reaction, ensuring that molecules have enough energy to overcome the energy barrier for the reaction to proceed.

Deck 12: Kinetics