Question

The rate constant of a reaction is 6.7 × 10−3 s−1 at 25°C, and the activation...

The rate constant of a reaction is 6.7 × 10−3 s−1 at 25°C, and the activation energy is

33.6 kJ/mol.

What is k at 75°C? Enter your answer in scientific notation.

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Arrhenius equation states

k = A e-Ea/RT

where k = rate constant

A = preexponential factor

Ea = Activation energy

R = gas constant = 8.31 JK-1mol-1

T = temperature in Kelvin

ln k = -Ea/RT + ln A

so

ln(k1/k2) = Ea/R (T1-T2/T1T2)

ln(6.7 x 10-3/k2) = 33600/8.31 x (298 - 348 /298 x 348)

ln(6.7 x 10-3/k2) = 33600/8.31 x (4.821 x 10-4)

ln(6.7 x 10-3/k2) = -1.949

(6.7 x 10-3/k2) = e-1.949

(6.7 x 10-3/k2) = 0.1424

k2 = (6.7 x 10-3/0.1424

k2 = 4.7 x 10-2

The rate constant at 75 oC is 4.7 E-2

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
the rate constant of a reaction is 4.0x10^-3 s^-1 at 25 degrees C, and the activation...
the rate constant of a reaction is 4.0x10^-3 s^-1 at 25 degrees C, and the activation energy is 33.6 kJ/mol. What is k at 75 degrees C? Enter in scientific notation
If the rate constant k of a reaction doubles when the temperature increases from 121 °C...
If the rate constant k of a reaction doubles when the temperature increases from 121 °C to 279 °C, what is the activation energy of the reaction in units of kJ/mol? Do not enter units with your numerical answer. Do not use scientific notation.
The rate constant of a reaction is 8.05 × 10−5 L/mol·s at 195°C and 3.20 ×...
The rate constant of a reaction is 8.05 × 10−5 L/mol·s at 195°C and 3.20 × 10−3 L/mol·s at 258°C. What is the activation energy of the reaction? Enter your answer in scientific notation.
A certain first-order reaction has a rate constant of 2.30×10−2 s−1 at 25 ∘C . What...
A certain first-order reaction has a rate constant of 2.30×10−2 s−1 at 25 ∘C . What is the value of k at 63 ∘C if Ea = 74.0 kJ/mol ? Express your answer using two significant figures. Part B Another first-order reaction also has a rate constant of 2.30×10−2 s−1 at 25 ∘C . What is the value of k at 63 ∘C if Ea = 128 kJ/mol ? Express your answer using two significant figures.
Part A A certain first-order reaction has a rate constant of 3.00×10−2 s−1 at 25 ∘C...
Part A A certain first-order reaction has a rate constant of 3.00×10−2 s−1 at 25 ∘C . What is the value of k at 69 ∘C if Ea = 77.0 kJ/mol ? Express your answer using two significant figures. Part B Another first-order reaction also has a rate constant of 3.00×10−2 s−1 at 25 ∘C . What is the value of k at 69 ∘C if Ea = 115 kJ/mol ? Express your answer using two significant figures.
Calculate the rate constant, k, for a reaction at 65.0 °C that has an activation energy...
Calculate the rate constant, k, for a reaction at 65.0 °C that has an activation energy of 87.1 kJ/mol and a frequency factor of 8.62 × 1011 s–1.
The rate constant of a first-order reaction is 3.20 × 10−4 s−1 at 350.°C. If the...
The rate constant of a first-order reaction is 3.20 × 10−4 s−1 at 350.°C. If the activation energy is 135 kJ/mol, calculate the temperature at which its rate constant is 9.15 × 10−4 s−1.
If the rate constant increases from 0.40 M –1 s –1 at 25°C to 0.80 M...
If the rate constant increases from 0.40 M –1 s –1 at 25°C to 0.80 M –1 s –1 at 35°C, what is the activation energy in kJ/mol for this reaction?
If a first order reaction has a rate constant of 4.15 X 10-2 s-1 at a...
If a first order reaction has a rate constant of 4.15 X 10-2 s-1 at a temperature of 24.5oC, what would the value of k be if the reaction temperature was changed to 52oC given that the activation energy is 67.8 kJ/mol?
The first order rate constant for a reaction at 790 oC is 4.05e-03 s-1. If the...
The first order rate constant for a reaction at 790 oC is 4.05e-03 s-1. If the activation energy for the reaction is 255 kJ/mol, what is the rate constant at 890 oC? k =  s-1
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT