Lesson 1 2 And 3 Flashcards
(20 cards)
What is the branch of physical chemistry that studies the mechanism by which reactions proceed?
Chemical kinetics
Chemical kinetics focus on the rates of chemical reactions and the factors affecting them.
What is the term for reactions that are very fast, completing in a matter of seconds?
Very fast reactions
These reactions can occur in as little as 10^(-14) to 10^(-16)seconds.
What type of reactions cannot have their rate of reaction (RoR) determined?
Slow reactions
An example of a slow reaction is rusting.
What is an example of a moderate rate reaction?
Haber Process
This reaction involves nitrogen and hydrogen to produce ammonia.
Fill in the blank: The rate of reaction (RoR) for very slow reactions cannot be _______.
determined
This highlights the challenge in measuring reaction rates for certain types of reactions.
What does ROR stand for?
ROR stands for Rate of Reaction.
What is the formula for the ideal gas law?
PV = nRT
What does ROR measure?
ROR measures the rate of change of concentration of reactants and products over time.
What is the unit for the rate of reaction?
The unit for the rate of reaction is mol/L sec^-1
What is the relationship between concentration and rate of reaction?
The rate of reaction increases with the change in concentration of reactants.
Mainly in Law of Mass Action
What is the rate of change of concentration in a gaseous reaction?
The rate of change of concentration in a gaseous reaction is expressed as atm/sec.
What is the formula for the rate of disappearance?
Rate of disappearance A = -ΔA/Δt
A represents the reactant concentration.
What is the formula for the rate of appearance?
Rate of appearance P = +ΔP/Δt
P represents the product concentration.
How is the rate of appearance of a product defined?
Rate of appearance of product = +ΔP/Δt
P represents the product concentration.
What is ROR?
ROR is defined for one mole.
Not defined in the provided text.
What is the average rate of reaction?
The rate at which reactants are converted to products over a specific time interval.
Example: The average rate can be calculated by measuring the change in concentration of reactants or products over time.
What is the formula for average rate?
Average Rate = (Change in Concentration) / (Change in Time).
What is the significance of time in reactions?
Time is crucial for determining the rate at which reactants are consumed and products are formed.
What is the instantaneous rate of reaction?
The rate of reaction at a particular instant of time during the course of the reaction.
What does the term ‘tangent slope’ refer to?
The slope of the tangent line at a specific point on a graph, representing the instantaneous rate.
