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
GuDViN [60]
3 years ago
13

If a temperature increase from 12.0 ∘c to 20.0 ∘c doubles the rate constant for a reaction, what is the value of the activation

barrier for the reaction?
Chemistry
1 answer:
Blababa [14]3 years ago
7 0
According to this formula:
㏑(K2/K1) = Ea / R / (1/T1 - 1/T2)

Ea = R ㏑(K2/K1) / (1/T1 - 1/T2)
When (K2/K1) the rate constant for the reaction = 2 (because it's doubled) 
and we have R constant = 8.314 and T1= 12 + 273 = 285 kelvin T2 = 20 + 273=293 Kelvin
So by substitution:
∴ Ea (the activation barrier for the reaction) =( 8.314* ㏑(2) ) / (1/285 - 1/293)
              = 60155 J Mol^-1 = 60 KJmol^-1
You might be interested in
A salt is formed when an acld and _____ react.<br>A.Water<br>B.another acid<br>C.base.​
Dovator [93]
Acid and base forms salts
4 0
3 years ago
How many grams of oxygen is needed to completelt react with of 9.30 of aluminum
Leona [35]

Hey there!

Given the reaction:

4 AI + 3O2 ------>  2 AI2O3

4 moles Al --------- 3 moles O2

9.30 moles Al  --------- ?? moles  O2

9.30 * 3 / 4  =>  6.975 moles of O2

Molar mass O2 => 32.0 g

Therefore:

6.975 * 32.0 =>  223.3 g of Oxygen

Hope that helps!

5 0
3 years ago
7. How many moles are in 5 x 10 2 atoms of gold?
goblinko [34]

Answer:

8.3028894e-22

Explanation:

5x10^2 atoms/1 x 1 mol/6.022x10^23

7 0
3 years ago
What is the first step of the scientific method?
IgorLugansk [536]

Answer:

I believe your answer is B) make a prediction

Explanation:

4 0
3 years ago
Which of the following best describes a fission reaction involving lithium? (1 point)
boyakko [2]

Answer:

D, ABC, C, A, ?, B, A, ?, B, C, D, D, C, D

Explanation:

(Answers and explanations in order of questions)

Fission reactions are when the nucleus of an atom splits producing smaller nuclei and energy

Lack of space isn't a safety risk

Coal, natural gases, and oil all are burned to create energy which releases carbon into the atmosphere, polluting it. Nuclear power doesn't burn carbon-based substances and so is fine

I dunno but C and D are wrong

All of them are technically renewable?

Geothermal energy uses the Earth's heat, hence the name

Nothing can happen if people ignore it

Unsure

Synthetic polymers are plastics, which do not decay naturally

A base would react with the acid to neutralise it which is the fastest way to improve the lake

Not pesticides?

Oil spills kill aquatic animals and life quickly, which causes huge damage to ecosystems

If nothing changes nonrenewable things will run out and bad practices will have caused irreparable damage worldwide

Big factories are pumping out the bad stuff

4 0
3 years ago
Read 2 more answers
Other questions:
  • Why does table salt dissolve more rapidly than rock salt
    11·2 answers
  • What's a good model for isostasy is
    11·1 answer
  • Where in the atom are the electrons that are involved in chemical bonding located?
    6·2 answers
  • What combination of elements from ionic bonds
    6·1 answer
  • 3. What is the shape of 3p atomic orbital? (1 point)
    10·1 answer
  • A sample of helium has a volume of 3 liters when the pressure is 500 kPa. What volume does the gas occupy at 300 kPa?
    7·1 answer
  • What is density measured in... for example if i had 68 what would be the suffix for that
    10·1 answer
  • A gas at 89C occupies a volume of 0.67 L. At least what temperature will the volume increase to 1.12 L
    11·1 answer
  • A diagram of the areas surrounding the Gulf of Mexico is provided. A hurricane that comes in from the Gulf of Mexico will most l
    7·1 answer
  • Which isomer of 1-bromo-2-tert-butylcyclohexane reacts faster when refluxed with potassium tert-butoxide?Draw the structure of t
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!