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
motikmotik
3 years ago
14

For which of the following reactions is the ratio kp/kc largest at 300 k?

Chemistry
2 answers:
Yanka [14]3 years ago
8 0

Answer:

Reaction c. has the largest value of \frac{k_{p} }{k_{c} } =  1.55 X 10^{10} at 300 K

Explanation:

Here is the complete question

Converting between Kc and Kp For which of the following reactions is the ratio Kp/Kc largest at 300 K?  

a. N2(g) + O2(g) ⇌ 2 NO(g)

b. C(s) +2H2(g) ⇌ CH4(g)

c. Ni(CO)4(g) ⇌ Ni(s) + 4CO(g)

d. CaCO3(s) ⇌ CaO(s) + CO2(g)

Solution

k_{p} = k_{c}(RT)^{n}\\\frac{k_{p} }{k_{c} } =  (RT)^{n}

where R = molar gas constant = 8.314 J/mol-K, T = temperature = 300 K and n = number of moles of products - number of moles of reactants

For reaction a. number of moles of gaseous products = 2, number of moles of gaseous reactants = 2. So n = 2 - 2 = 0

So, \frac{k_{p} }{k_{c} } =  (RT)^{n} = (RT)^{0} = 1

For reaction b. number of moles of gaseous products = 1, number of moles of gaseous reactants = 2. So n = 1 - 2 = -1 (we do not include the solid)

So, \frac{k_{p} }{k_{c} } =  (RT)^{n} = (RT)^{-1} = (8.314 X 300)^{-1} = (2494.2)^{-1} = 4.01   X 10^{-4}

For reaction c. number of moles of gaseous products = 5, number of moles of gaseous reactants = 1. So n = 4 - 1 = 3 (we do not include the solid)

So, \frac{k_{p} }{k_{c} } =  (RT)^{n} = (RT)^{3} = (8.314 X 300)^{3} = (2494.2)^{3} = 1.55 X 10^{10}

For reaction d. number of moles of gaseous products = 2, number of moles of gaseous reactants = 0. So n = 2 - 0 = 2 (we do not include the solid)

So, \frac{k_{p} }{k_{c} } =  (RT)^{n} = (RT)^{2} = (8.314 X 300)^{2} = (2494.2)^{2} = 6.22 X 10^{6}

Since \frac{k_{p} }{k_{c} } =  1.55 X 10^{10} for reaction c which is the largest value. So, reaction c. has the largest value of \frac{k_{p} }{k_{c} } =  1.55 X 10^{10} at 300 K

Novosadov [1.4K]3 years ago
3 0
Below are the choices:

<span>A. Ni(CO)4(g) ⇌ Ni(s) + 4CO(g)
B. C(s) +2H2(g) ⇌ CH4(g)
C. CaCO3(s) ⇌ CaO(s) + CO2(g)
D. N2(g) + O2(g) ⇌ 2 NO(g)
</span>
The answer is A. Ni(CO)4(g) ⇌ Ni(s) + 4CO(g)

<span>The Kp/Kc ratio is equal to (RT)Δn. K is a constant and the temperature is held constant. So, the Kp/Kc ratio depends on Δn or the difference of moles of gaseous product and reactant. The reaction with the greatest Kp/Kc ratio is Ni(CO)4(g) ⇌ Ni(s) + 4CO(g) with a Δn of 3.</span>
You might be interested in
Compare and contrast the shapes of different cloud types
mylen [45]
<span>There are many different kinds of clouds all around us. Clouds come in diverse shapes and colors. Some clouds are fluffy and others are wispy.  Some clouds float high in the sky and others sit low on the ground. Some clouds warn of storms and other clouds tell of fair weather.  Compare and contrast the characteristics of different types of clouds through vibrant photographs.</span>
3 0
3 years ago
Balancing oxidation-reduction reactions <br> Mg+ N2—&gt;Mg3N2
BartSMP [9]

Answer:

{ \sf{3Mg_{(s)} + N_{2(g)} →Mg _{3}N_{2(s)}}}

3 0
3 years ago
Please help
sergey [27]

Answer:

The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century.

The basic steps of the scientific method are:

1) investigation

2) hypothesis

3) interpretation

4) conclusions

7 0
3 years ago
What is percent composition of carbon in c2h6o3
zubka84 [21]

the percentage composition of carbon is 30.77%

5 0
3 years ago
Iron reacts slowly with oxygen and water to form a compound commonly called rust (Fe₂O₃?4H₂O). For 45.2 kg of rust, calculate
Mashcka [7]

Rust (Fe2O3. 4H2O) is formed when iron interacts slowly with oxygen and water. Mass of Fe in grams is 2.18 x 10⁴ g.

<h3>What is the explanation?</h3>

There are 2 moles of Fe atoms in 1 mole of Fe2O3-4H2O. The number of moles of Fe atoms in 45.2 kg rust is shown below.

Moles of Fe = 195.01 mol Fe₂O₃.4H₂O ( \frac{2 mol Fe }{1 mol Fe₂O₃.4H₂O} )

Moles of Fe = 390.02 mol Fe

Multiply the calculated number of moles of iron, Fe, by its molar mass which is 55.85 \frac{g}{mol}

Mass of Fe = 390.02 mol Fe ( \frac{55.85 g Fe}{mol Fe} )

Mass of Fe = 2.18 x 10⁴ g Fe

Avogadro's number (6.022 x 1023) of molecules (or formula units) make up one mole of a substance (ionic compound). The mass of 1 mole of a chemical is indicated by its molar mass. It provides you with the amount of grams per mole of a substance, to put it another way.

To learn more about moles visit:

brainly.com/question/26416088

#SPJ4

4 0
2 years ago
Other questions:
  • All fossils were formed from .
    10·1 answer
  • Devise a way to separate sand from a mixture of charcoal, sand, sugar, and water
    6·1 answer
  • Explain why two thin sweaters feel warmer then one thick sweater​
    10·1 answer
  • A 1.50-liter sample of dry air in a cylinder exerts a pressure of 3.00 atmospheres at a temperature of 25°C. Without changing th
    13·1 answer
  • 1. What is the kinetic energy of 44 kg cheetah running at 31m/s speed?
    10·1 answer
  • What is the mass of one iron atom in grams?
    12·2 answers
  • What’s one renewable energy resource that can be used instead of fossil fuels ?
    15·1 answer
  • Anyone know the answer
    11·1 answer
  • If she traveled 10 m in 5 seconds, what was her average speed?
    12·1 answer
  • Using the model what is the mass of the aluminum atom
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!