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
Mass box A = 10 grams; Mass box B = 5 grams; Mass box C—made of one A and one B Mass ratio A/B =
LUCKY_DIMON [66]

Answer:

mass ratio of A/B is 2:1

Explanation:

Since the mass of box A = 10g

                mass of box B = 5g

   Mass of box C = mass of box A + mass of box

A ratio compares two quantities. To find the ratio of the two boxes:

  Ratio of A to B = \frac{mass of A}{mass of B}

  Ratio of A to B = \frac{10grams}{5grams} = 2

The mass ratio is 2:1 i.e box A has twice the mass of B

8 0
3 years ago
Alex saw a rusty old car in an abandoned lot. Because he had recently read about chemical reactions, he began to wonder how the
Mice21 [21]

The answere is A .......


8 0
3 years ago
Select the correct answer​
Vladimir79 [104]
C. 14 protons and 14 electrons
6 0
3 years ago
Why must the ph ammonia buffer solution be stored and dispensed in the fume exhaust hood?
Vadim26 [7]

On the other hand ammonia is a very dangerous chemical which has a pungent smell and effect the eyes of the user. Thus it kept always in the fume exhaust hood for storing and dispensing function.  

The  pH of ammonia buffer contains ammonium hydroxide (NH₄OH) and a salt of ammonia with a  strong acid like (HCl) which produces, ammonium chloride (NH₄Cl) mixture. The evaporation rate of ammonia is so high at room temperature thus on opening of the buffer solution the ammonia get evaporated very fast and the concentration of ammonia decreases which affect the pH of the buffer solution.

Thus the reason to put ammonia buffer in fume hood is explained.


7 0
3 years ago
How many atoms are there in 7.80 moles of germanium
Orlov [11]
<h3>Answer:</h3>

4.70 × 10²⁴ atoms Ge

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Using Dimensional Analysis
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
<h3>Explanation:</h3>

<u>Step 1: Define</u>

7.80 mol Ge

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

\displaystyle 7.80 \ mol \ Ge(\frac{6.022 \cdot 10^{23} \ atoms \ Ge}{1 \ mol \ Ge} ) = 4.69716 × 10²⁴ atoms Ge

<u>Step 4: Check</u>

<em>We are given 3 sig figs. Follow sig fig rules and round.</em>

4.69716 × 10²⁴ atoms Ge ≈ 4.70 × 10²⁴ atoms Ge

8 0
2 years ago
Other questions:
  • Which statement best describes chemical properties of matter? Chemical properties, such as density, must be observed when a subs
    5·2 answers
  • A rock has a mass of 13.0 g and displaces a volume of 3.9 mL of water in a graduate cylinder. What is the density of the rock? (
    10·1 answer
  • How do you give someone branily if only one person answered
    9·2 answers
  • What's the word called part of an experiment that changes to observe an outcome?
    15·1 answer
  • 7. A scientist is trying to determine the identity of an element. It is highly reactive in water
    7·1 answer
  • Sunlight shining through a clear window it’s Jeremy’s face while he does his homework he uses a large wooden wooden block to cov
    6·2 answers
  • Name one material needed for<br> photosynthesis?
    13·2 answers
  • Can someone help me with this??
    9·2 answers
  • What is the concentration of lithium ions in 0.400 M Li₂HPO₄?
    7·1 answer
  • The image represents a typical temperate forest food web. Use the image to answer the following questions(s).
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!