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
blagie [28]
3 years ago
11

A reaction has a rate constant of 0.000122s-1 at27oC and 0.228s-1 at 77oC. a)Determine the activation energy of the reaction. b)

What is the value of the rate constant at17oC
Chemistry
1 answer:
nikitadnepr [17]3 years ago
7 0

Answer:

a) Ea=-131.522x10^{3}\frac{J}{mol}

b) k_3=1.98x10^{-5}s^{-1}

Explanation:

Hello,

a) In this case, for this kinetics problem, we can consider the temperature-dependent Arrhenius equation:

ln(\frac{k_2}{k_1} )=\frac{Ea}{R}(\frac{1}{T_2}-\frac{1}{T_1}  )

In such a way, for the given temperatures and rate constant, we compute the activation energy as follows:

ln(\frac{0.228s^{-1}}{0.000122s^{-1}} )=\frac{Ea}{R}(\frac{1}{(77+273)K}-\frac{1}{(27+273)K}  )\\\\7.533=\frac{Ea}{R}*-4.762x10^{-4}K^{-1}\\ \\Ea=R\frac{7.533}{-4.762x10^{-4}K^{-1}} \\

Ea=8.314\frac{J}{mol*K}*-15819.3K\\\\Ea=-131.522x10^{3}\frac{J}{mol}

b) In this case, we use the previously computed activation energy in order to compute the rate constant at the asked 17°C:

k_3=k_1exp(\frac{Ea}{R}(\frac{1}{T_2}-\frac{1}{T_1}  ))\\\\k_3=0.000122s^{-1}exp[\frac{-131.522x10^3\frac{J}{mol} }{8.314\frac{J}{mol*K}}*(\frac{1}{(17+273)K} -\frac{1}{(27+273)K} )]\\\\k_3=1.98x10^{-5}s^{-1}

Best regards.

You might be interested in
Nikolas, the fire extinguisher, and the skateboard have a combined mass of 50 kg. What force would the fire extinguisher have to
murzikaleks [220]

Answer:

Force used by fire extinguisher = 60 N

Explanation:

Given:

Mass of skateboard with fire extinguisher = 50 kg

Acceleration of fire extinguisher = 1.2 m/s²

Find:

Force used by fire extinguisher = ?

Computation:

⇒ Force = Mass × Acceleration

⇒ Force used by fire extinguisher = Mass of skateboard with fire extinguisher × Acceleration of fire extinguisher

⇒ Force used by fire extinguisher = 50 kg × 1.2 m/s²

⇒ Force used by fire extinguisher = 60 N

3 0
3 years ago
Read 2 more answers
Assignment<br>Explain why it is not advisable to wear<br>black silky cloth in the sun​
Crazy boy [7]

Answer:

It is not water absorbant and also the colour black, due to it's dark nature makes the person wearing the cloth feel hot. Unlike cotton, silk is not at all water absorbant as it does not absord any sweat produced in the wearers body

3 0
2 years ago
If you had excess aluminum, how many moles of aluminum chloride could be produced from 28.0 g of chlorine gas, Cl2?
Mice21 [21]

Answer:

Yes chemistry. Try to add then multiply the top. Get the moles and you will find it.

Explanation:

Try to add then multiply the moles in the equation

6 0
3 years ago
why a gas, at constant pressure, increases greatly in volume when it is gently heated but a solid does not
11Alexandr11 [23.1K]

Explanation:

This is because gas particles are free to move as they are not held in place by strong molecular forces while particles in a solid are

8 0
3 years ago
Which ocean surface current travels north along the eastern United States coast? A. Labrador current B. Canaries current C. Gulf
Marina86 [1]
It is answer C
there ya go friend
8 0
3 years ago
Read 2 more answers
Other questions:
  • At what condition to sodium chloride and silver nitrate react
    11·1 answer
  • Why do animals want to live in the Sahara desert
    6·1 answer
  • I have no idea what I'm doing in chemistry please help.
    10·1 answer
  • 2.5 moles of sodium chloride is dissolved<br> to make 0.050 liters of solution.
    9·1 answer
  • Which of these 2A elements has the largest atomic radius?
    11·1 answer
  • Please can you help me from 1 to 6
    8·1 answer
  • Do the number of moles of a gas impact the pressure of a gas?
    12·1 answer
  • Spanish/español: ¿por qué los elementos se combinan para para formar compuestos?
    6·2 answers
  • When gravity is the only force acting on an object, the object is said to be in__.
    7·2 answers
  • Which inner planet has 2 moons? Question 2 options: Mercury Venus Earth Mars
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!