
According to the Arrhenius equation:
A.High activation energy usually implies a fast reaction.
B.Rate constant increases with increase in temperature. This is due to a greater number of collisions whose energy exceeds the activation energy.
C.Higher the magnitude of activation energy, stronger is the temperature dependence of the rate constant
D.The pre-exponential factor is a measure of the rate at which collisions occur, irrespective of their energy.
Answer
507.6k+ views
1 likes
Hint: The equation called the Arrhenius equation is usually written as where the pre-exponential factor is a constant and is called frequency factor and is called the activation energy, R is the gas constant and T is the temperature. The activation energy calculated by the formula are rate constants at different temperatures.
Complete step by step answer:
Now according to Arrhenius equation:
When increases, the value of decreases due to the negative sign. This implies that higher activation means a lower rate of reaction. Thus, option A can be eliminated.
When then which means that, , then we can see that when the temperature increase, the rate constant increases and approaches the value close to Arrhenius constant. So, option B is correct.
As we know that with higher activation energy, the rate of reaction decreases and with higher temperature, the rate of reaction increases. So, at higher activation energies, i.e. if the activation energy is constant, the rate of reaction is dependent only on the temperature. So, option C is correct.
The pre-exponential factor is always constant for a particular reaction, irrespective of temperature. It represents the frequency of collision at a standard concentration. Thus, option D is correct.
Hence, option B, C and D are correct.
Note:
Arrhenius equation is employed to calculate the rate of a reaction. It is an important part of chemical kinetics. It helps in understanding the effect of temperature on the rate of a reaction. This equation was proposed in 1889 by Svante Arrhenius.
Complete step by step answer:
Now according to Arrhenius equation:
When
When
As we know that with higher activation energy, the rate of reaction decreases and with higher temperature, the rate of reaction increases. So, at higher activation energies, i.e. if the activation energy is constant, the rate of reaction is dependent only on the temperature. So, option C is correct.
The pre-exponential factor is always constant for a particular reaction, irrespective of temperature. It represents the frequency of collision at a standard concentration. Thus, option D is correct.
Hence, option B, C and D are correct.
Note:
Arrhenius equation is employed to calculate the rate of a reaction. It is an important part of chemical kinetics. It helps in understanding the effect of temperature on the rate of a reaction. This equation was proposed in 1889 by Svante Arrhenius.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
Recently Updated Pages
Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 12 English: Engaging Questions & Answers for Success

Trending doubts
What is the Full Form of PVC, PET, HDPE, LDPE, PP and PS ?

What are saprophytes Give two examples class 12 biology CBSE

How do you convert from joules to electron volts class 12 physics CBSE

Mirage is a phenomena due to A Refraction of light class 12 physics CBSE

Why did French artist Frederic sorrieu prepare a series class 12 social science CBSE

What is Nutrition Explain Diff Type of Nutrition ?
