# What Is The Rate Constant

In chemistry the rate constant is a measure of the speed at which a reaction occurs. It is usually expressed in terms of the rate of change of the concentration of a reactant or product with respect to time. The rate constant is a constant for a given reaction and is independent of the concentrations of the reactants and products. The value of the rate constant depends on the temperature pressure and other conditions of the reaction.

## What is the rate constant?

Answer: The rate constant is the constant of proportionality that relates the rate of a chemical reaction to the concentrations of the reactants.

## How is the rate constant related to the rate of a chemical reaction?

Answer: The rate constant is proportional to the rate of a chemical reaction.

## How is the rate constant related to the concentrations of the reactants?

Answer: The rate constant is inversely proportional to the concentrations of the reactants.

## What is the units of the rate constant?

Answer: The units of the rate constant depend on the order of the reaction.

## What is the rate constant for a first order reaction?

Answer: The rate constant for a first order reaction is k= -ln(A)/t

## What is the rate constant for a second order reaction?

Answer: The rate constant for a second order reaction is k= 1/([A]t)

## What is the rate constant for a zero order reaction?

Answer: The rate constant for a zero order reaction is k= 1/t

## What is the rate constant for a third order reaction?

Answer: The rate constant for a third order reaction is k= 1/([A]^2t)

## How does the rate constant change with temperature?

Answer: The rate constant increases with temperature.

## What is the Arrhenius equation?

Answer: The Arrhenius equation is k= Ae^(-Ea/RT)

## What is the activation energy?

Answer: The activation energy is the minimum energy required for a chemical reaction to occur.

## What is the Arrhenius constant?

Answer: The Arrhenius constant is a proportionality constant in the Arrhenius equation.

## What is the gas constant?

Answer: The gas constant is the constant of proportionality that relates the energy of a system to the temperature of the system.

## What is the frequency factor?

Answer: The frequency factor is a proportionality constant in the Arrhenius equation.

## How does the rate constant change with temperature?

Answer: The rate constant increases with temperature.