# What is the unit of slope in Arrhenius equation?

## What is the unit of slope in Arrhenius equation?

The value of the slope (m) is equal to -Ea/R where R is a constant equal to 8.314 J/mol-K. The activation energy can also be found algebraically by substituting two rate constants (k1, k2) and the two corresponding reaction temperatures (T1, T2) into the Arrhenius Equation (2).

## What are the units of A for a first order reaction in Arrhenius equation?

In both forms of the equation, the units of A are the same as those of the rate constant. The units vary according to the order of the reaction. In a first-order reaction, A has units of per second (s-1), so it may also be called the frequency factor.

**What is the value of A in Arrhenius equation?**

Arrhenius equation kB A = pre-exponential factor, sometimes called the Arrhenius constant, in the same units as the rate constant; e ≈ 2.72 = Euler’s number (exponent); Ea = the activation energy of the reaction, in J * molecule-1; kB = Boltzmann constant, equal to 1.380649×10−23 J * K-1; and.

**What are the units of the pre-exponential factor?**

Temperature Dependence of Reactions In first order reactions, the units of the pre-exponential factor are reciprocal time (e.g., 1/s). Because the pre-exponential factor depends on frequency of collisions, it is related to collision theory and transition state theory.

### What are the units of 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 activation energy?

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 are the units for ln k?**

**What is Arrhenius equation and write the units of the quantities involved in the equation?**

Arrhenius equation Note: The Arrhenius equation is sometimes expressed as k = Ae-E/RT where k is the rate of chemical reaction, A is a constant depending on the chemicals involved, E is the activation energy, R is the universal gas constant, and T is the temperature.

#### What are the units for activation energy?

What is the SI Unit of Activation Energy? 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 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 is the unit for rate constant?**

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). Created by Yuki Jung.

**Can ln have a unit?**

The real deal is that you cannot take the log (or ln) of a number that actually has units, i.e., before the log (or ln) is applied, the unit must be dimensionless. You may be familiar with the concept of making quantities that otherwise have units, unitless, as being referred to as activities in chemistry.

## Does ln V have units?

ln(V) and ln(Vo) must also be dimensionless and unitless for the equation to balance. Dadface said: RC and t both have the dimensions of time and so the ratio t/RC is dimensionless (and unitless). ln(V) and ln(Vo) must also be dimensionless and unitless for the equation to balance.

## What is activation energy in Arrhenius equation?

The Arrhenius equation is sometimes expressed as k = Ae-E/RT where k is the rate of chemical reaction, A is a constant depending on the chemicals involved, E is the activation energy, R is the universal gas constant, and T is the temperature.

**What is SI unit of activation energy?**

The SI unit of activation energy is KJ/mol.

**What is the unit of rate constant of nth order reaction?**

For nth order reaction, the units of rate constant = (molL−1)1−n. s−1.

### What are the units of k in the following rate law rate k x ][ y 1 2?

Chemical Kinetics

Question | Answer |
---|---|

What are the units for K in Rate= k[X] and k[X]^0[Y]^0? | 1/s |

What are the units for K in Rate= k[X][Y]^1/2? | M-1/2s-1 |

What are the units for K in Rate= k[X]^2? | M-1s-1 |

Which of the following represents the integrated rate law for a first-order reaction? | ln[A]t/[A]o= -kt |

### What are the units of k for the rate law rate k A ][ B ² when the concentration unit is mol L?

Reaction Order and Rate Constant Units

Reaction Order | Units of k |
---|---|

zero | mol/L/s |

first | s−1 |

second | L/mol/s |

third | mol−2 L2 s−1 |

**What is unit of ln?**

The units of a ln(p) would generally be referred to as “log Pa” or “log atm.” Taking the logarithm doesn’t actually change the dimension of the argument at all — the logarithm of pressure is still pressure — but it does change the numerical value, and thus “Pa” and “log Pa” should be considered different units.

**What is the unit of ln?**

The units of a ln(p) would generally be referred to as “log Pa” or “log atm.”