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
Hoochie [10]
3 years ago
9

The activation energy (E*) for 2N2O ---> 2N2 + O2 is 250 KJ. If the k for this reaction is 0.380/M at 1001oK, what will k be

at 298oK? What will the half-life be at both temperatures?
Chemistry
1 answer:
Sedbober [7]3 years ago
3 0

Answer:

Explanation:

GIven that:

The activation energy = 250 kJ

k₁ = 0.380 /M

k₂ = ???

Initial temperature T_1 = 1001 K

Final temperature T_2 = 298 K

Applying the equation of Arrhenius theory.

In \dfrac{k_2}{k_1 }= \dfrac{Ea}{R}( \dfrac{1}{T_1 }- \dfrac{1}{T_2})

where ;

R gas constant = 8.314  J/K/mol

In \dfrac{k_2}{0.380 }= \dfrac{250 * 10^3}{8,314}( \dfrac{1}{1001 }- \dfrac{1}{298})

In \dfrac{k_2}{0.380 }= -70.8655

\dfrac{k_2}{0.380 }= e^{-70.8655}

\dfrac{k_2}{0.380 }= 1.67303256 \times 10^{-31}

{k_2}= 1.67303256 \times 10^{-31} \times {0.380 }

{k_2}= 6.3575 \times 10^{-32}  /M .sec

Half life:

At 1001 K.

t_{1/2} = \dfrac{In_2}{k_1}

t_{1/2} = \dfrac{0.693}{0.38}

t_{1/2} = 1.82368 secc

At 298 K:

t_{1/2} = \dfrac{0.693}{6.3575 \times 10^{-32}}

t_{1/2} =1.09 \times 10^{31} \ sec

You might be interested in
What is the volume, in liters, of 0.500 mol of c3 h8 gas at stp?
saw5 [17]
It's about .0934 Liters at STP. 
5 0
3 years ago
Please help me with 6 7 8 and don’t send me a link tell me here please
lukranit [14]

Answer:

6 b physical properties

7b melting point

8 boiling

5 0
3 years ago
2B + 3H2 2BH3<br> How many moles of BH3 are synthesized when 27.0 moles of H2 completely react?
densk [106]

Answer:

fa o poză te rog frumos ca nu stiu ce ex este

3 0
3 years ago
200 grams of an organic sample which contains only carbon, hydrogen and oxygen is analyzed and found to contain 97.30grams of ca
Klio2033 [76]
The empirical formula is C2H4O
7 0
3 years ago
Which sample of matter has a crystal structure?
Maurinko [17]
The correct answer:C) NaCl(s)
Hope this helps!
4 0
4 years ago
Other questions:
  • Name an atom that loses one electron when it reacts to another atom
    14·1 answer
  • Can anyone help me :)
    14·1 answer
  • _____H2 + _____O2  _____H2O<br> How many grams of water will you make from 7 moles of H2?
    5·1 answer
  • Look at the chemical equation
    7·1 answer
  • The burning of fossil fuels produces what kind of energy​
    13·1 answer
  • What is an example of an initiation phase for an addition
    9·1 answer
  • Which statement best describes a chemical change?
    7·2 answers
  • Aluminium is the most common metal in the Earth's crust.<br> Which is NOT a property of aluminium?
    6·1 answer
  • Scientists claim that climate change is happening because Earth is warming. They
    15·2 answers
  • In need of some help with this question please~
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!