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
Svetradugi [14.3K]
3 years ago
12

A. Based on the activation energies and frequency factors, rank the following reactions from fastest to slowest reaction rate, a

ssuming they are all at the same temperature and that each starts with the same initial concentration.
E, 50 kJ/mol E,-350 kJ/mol 50 kJ/mol
A = 1.5 × 10-7 s-i A = 1.9 × 10-7 s-i A = 1.5 × 10-7 s-1
Fraction of molecules
The exponential term in the Arrhenius equation is equal to the fraction of molecules, f, with kinetic energy greater than or equal to the activation energy: f=e?Ea/(R?T). Most scientific calculators have an exfunction as the second function of the LN button.
B. A certain reaction with an activation energy of 165 kJ/mol was run at 505 K and again at 525 K . What is the ratio of f at the higher temperature to f at the lower temperature?
Chemistry
1 answer:
deff fn [24]3 years ago
6 0

Answer:

A) E_{a} = 350KJ/mol, E_{a} = 50KJ/mol, E_{a} = 50KJ/mol

     A = 1.5×10^{-7}s^{-1}, A = 1.9×10^{-7} s^{-1}, A=1.5×10^{-7} s^{-1}

B) 4.469

Explanation:

From Arrhenius equation

      K=Ae^{\frac{E_{a} }{RT} }

where; K = Rate of constant

            A = Pre exponetial factor

            E_{a} = Activation Energy

             R = Universal constant

             T = Temperature in Kelvin

Given parameters:

E_{a} =165KJ/mol

T_{1}=505K

T_{2}=525K

R=8.314JK^{-1}mol^{-1}

taking logarithm on both sides of the equation we have;

InK=InA-\frac{E_{a} }{RT}

since we have the rate of two different temperature the equation can be derived as:

In(\frac{K_{2} }{K_{1} } )=\frac{E_{a} }{R}(\frac{1}{T_{1} } -\frac{1}{T_{2} } )

In(\frac{K_{2} }{K_{1} } )=\frac{165000J/mol}{8.314JK^{-1}mol^{-1}  }.(\frac{1}{505} -\frac{1}{525} )

In(\frac{K_{2} }{K_{1} } )= 19846.04×7.544×10^{-5} = 1.497

\frac{K_{2} }{K_{1} } =e^{1.497} = 4.469

 

You might be interested in
The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night. Why? Group of ans
kati45 [8]

Answer:

The correct answer is a The calvin cycle requires products only produced when the photsystems are illuminated .It is often too cold at night for the reaction to take place.

Explanation:

It is true that the reactions of calvin cycle are not directly depends on light but depends on the products such as ATP and NADPH produced during light reaction.

       ATP and NADPH is formed by the illumination of photosystems by sun light.So during night time there is no chance for the light dependent illumination of the photosystems.

    As a result the ATP and NADPH are not formed during night .That"s why reactions of calvin cycle does not occur at night.

6 0
3 years ago
Which of the following water solutions would likely have the highest boiling point?
Vedmedyk [2.9K]

Answer:

1m

Explanation:

4 0
3 years ago
What effect does heating a solid to a hightemperature have have on its crystal lattice ??
kotegsom [21]

Arrangement of atoms or group of atoms in a three dimensional ordered pattern in a crystal is said to be a crystalline lattice. They are arranged in a specific pattern with high symmetry. The heating of the crystal at high temperature will result in the increase of vibrational kinetic energy of the atoms in the crystal and this will result in the breaking of lattice apart and due to the breaking of lattice apart the ions will flow freely.

Thus, the heating of a solid at high temperature will lead to the lattice breaks apart and ions will flow freely.

6 0
3 years ago
Read 2 more answers
Is C3HNO an organic molecule
antoniya [11.8K]

Answer:

Yes.

Explanation:

8 0
3 years ago
A ______________________ is the distance from one compression to the next compression in a longitudinal wave.
svetoff [14.1K]

Answer: D

Explanation:

8 0
2 years ago
Other questions:
  • The bonding of two atoms will most likely occur if: a more stable state can result from the union the outer shell can be complet
    13·1 answer
  • Industrial ethanol (CH3CH2OH) is produced by a catalytic reaction of ethylene (CH2═CH2) with water at high pressures and tempera
    6·1 answer
  • Two steel containers of equal volume contain two different gases at the same temperature. the first container holds 1.3 moles of
    6·1 answer
  • In chemical reactions, atoms are
    14·1 answer
  • Who proved that there are charged particles in an atom? dalton chadwick thomson bohr or rutherford?
    13·1 answer
  • If the same quantity of heat is added to both a 2-liter and a 4-liter container of water, the temperature change for water in th
    11·1 answer
  • Which of the following statements is true?
    13·2 answers
  • Write or show a complete formation of the following ionic compounds <br>a)sodium oxide (Na2O)​
    10·1 answer
  • Compare and contrast the Ionization energies of groups 1&amp;2 (Alkali and Alkaline metals) with the Ionization energies of grou
    7·1 answer
  • For a typical person who leads a sedentary lifestyle, a typical maximum oxygen intake level would be __________. A. 20 ml/kg/min
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!