What are the units of activation energy in the Arrhenius equation?

where k represents the rate constant, Ea is the activation energy, R is the gas constant (8.3145 J/K mol), and T is the temperature expressed in Kelvin. A is known as the frequency factor, having units of L mol-1 s-1, and takes into account the frequency of reactions and likelihood of correct molecular orientation.

What is the unit for activation energy?

joules
Activation energy is denoted by Ea. It is usually measured in joules (J) and or kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol).

What units must be used in the Arrhenius equation?

The unit of ΔE is commonly energy per mole, kJ/mol. The unit of the gas constant, R, is energy (kJ/mol) per degree Kelvin (K) per mole. The temperature, T, is in Kelvin, which is 273.15 + °C. Table 1.2 shows some of data that are used in the Arrhenius equation.

What is k in k AE EA RT?

k = Ae. −Ea. RT. Both A and Ea are specific to a given reaction. k is the rate constant.

What are the units for k?

The units of the rate constant, k, depend on the overall reaction order. The units of k for a zero-order reaction are M/s, the units of k for a first-order reaction are 1/s, and the units of k for a second-order reaction are 1/(M·s).

What are the units for ln k?

lnk=lnA−ERT. But according to this equation rate constant k doesn’t have units because we are taking the natural logarithm of it. According to rate laws, rate constants have units and they depend on the reaction.

What are the units of EA in chemistry?

The activation energy for the reaction can be determined by finding the slope of the line. Which R? well what is the unit for Ea? Ea is in J/mol so are you going to use the constant 0.08206 L•atm•mol-1•K-1 or are you going to use the constant 8.314 J•mol-1•K-1.

How do you find the activation energy of a Arrhenius graph?

The slope of the Arrhenius plot can be used to find the activation energy. The Arrhenius plot can also be used by extrapolating the line back to the y-intercept to obtain the pre-exponential factor, A. This factor is significant because A=p×Z, where p is a steric factor and Z is the collision frequency.

What are the units for rate constant k?

What is k in the Arrhenius equation?

In the Arrhenius equation, k is the reaction-rate constant, A represents the frequency at which atoms and molecules collide in a way that leads to a reaction, E is the activation energy for the reaction, R is the ideal gas constant (8.314 joules per kelvin per mole), and T is the absolute temperature.