1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vlabodo [156]
3 years ago
11

The activation energy of an uncatalyzed reaction is 95kJ/mol. The addition of a catalyst lowers the activation energy to 55kJ/mo

l. Assuming that the collision factor remains the same, by what factor will the catalyst increase the rate of the reaction at (a) 25°C, (b) 125°C?
Chemistry
1 answer:
notka56 [123]3 years ago
6 0

Answer:

a) at 25°C the rate of reaction increases by a factor of 1,027*10^7

b) at 25°C the rate of reaction increases by a factor of 1,777*10^5

Explanation:

using the Arrhenius equation

k= ko*e^(-Ea/RT)

where

k= reaction rate

ko= collision factor

Ea= activation energy

R= ideal gas constant= 8.314 J/mol*K

T= absolute temperature

for the uncatalysed reaction

k1= ko*e^(-Ea1/RT)

for the catalysed reaction

k2= ko*e^(-Ea2/RT)

dividing both equations

k2/k1= e^(-(Ea2-Ea1)/RT)

a) at 25°C

k2/k1 = e^(-(55kJ/mol-95kJ/mol)/(8.314J/mol*K*298K)* (1000J/kJ ) ) = 1,027*10^7

therefore at 25°C , k2/k1 = 1,027*10^6

b) at 125°C

k2/k1 = e^(-(55kJ/mol-95kJ/mol)/(8.314J/mol*K*298K)* (1000J/kJ ) ) = 1,777*10^5

therefore at 125°C , k2/k1 = 1,777*10^5

Note:

when the catalysts is incorporated, the catalysed reaction and the uncatalysed one run in parallel and therefore the real reaction rate is

k real = k1 + k2 = k2 (1+k1/k2)

since k2>>k1 → 1+k1/k2 ≈ 1 and thus k real ≈ k2

You might be interested in
What is the term for a solid that forms when two solutions are mixed? a precipitate a gas a suspension a solution
SashulF [63]
When a solid forms with two solutions are mixed it is a precipitate 
6 0
3 years ago
Read 2 more answers
Using the graph below please draw a reaction potential energy diagram for a reaction with the
azamat

Answer:

12

Explanation:

because it is the sam

7 0
3 years ago
HELP!!! WILL MARK BRAINLIEST!!!
Sophie [7]

Answer:

A , B, C

Explanation: D is a Diamagnetic

8 0
3 years ago
(01.01 LC)
Usimov [2.4K]

The answer would be "false" or the second option. A opinion is what you think on a certain subject and science is full of facts and opinions of other scientist which would mean your using someone else for your opinion just remember opinions is what you think about a subject and you can't use science for your opinion.

Hope this helps!

7 0
3 years ago
Read 2 more answers
Where do food molecules for cecropia trees come from?
Oliga [24]

Answer:

Central and South American forests.

Explanation: https://brainly.in/question/7540305

8 0
3 years ago
Other questions:
  • Observations made during an experiment are called
    8·1 answer
  • A break in the crust where slabs slip past each other is a(n)
    14·1 answer
  • What two actions are required to work together to move water to the top of tall plants? capillary action and gravity evaporation
    12·2 answers
  • Which of the following describes qualitative data
    14·2 answers
  • Select all that apply.
    10·2 answers
  • a sample of gas has a volume of 12.0 L and a pressure o 1.00 atm. If the pressure of gas is increased to 2.00 atm, what is the n
    6·1 answer
  • Explain why quilt is a better insulator than a woolen blanket of the same thickness ​
    15·1 answer
  • Calculate the specific heat of a metal if 1,270 joules of heat were released when 256 grams of metal cooled 5.8°C.
    11·1 answer
  • Freshwater biomes contain less salt than ocean biomes.<br> true or false
    13·1 answer
  • What are some damages for aftershocks
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!