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
Morgarella [4.7K]
3 years ago
11

How much work (in J) is involved in a chemical reaction if the volume decreases from 5.35 to 1.55 L against a constant pressure

of 0.829 atm?
Chemistry
1 answer:
Mrac [35]3 years ago
5 0

Answer:- work = 319 J

Solution:- The volume of the gas decreases from 5.35 L to 1.55 L.

\Delta V=1.55L-5.35L  = -3.80 L

external pressure is given as 0.829 atm.

w=-P_e_x_t\Delta V

where w is representing work.

Let's plug in the values and calculate pressure-volume work:

w=-0.829atm(-3.80L)

w = 3.15 atm.L

We need to convert atm.L to J.

1 atm.L = 101.325 J

So, 3.15atm.L(\frac{101.325J}{1atm.L})

= 319 J

So, 319 J of work is involved in a chemical reaction. Positive work means the work is done on the system.

You might be interested in
Question 2 of 50
wolverine [178]

The thermal decomposition of calcium carbonate will produce 14 g of calcium oxide. The stoichiometric ratio of calcium carbonate to calcium oxide is 1:1, therefore the number of moles of calcium carbonate decomposed is equal to the number of moles of calcium oxide formed.

Further Explanation:

To solve this problem, follow the steps below:

  1. Write the balanced chemical equation for the given reaction.
  2. Convert the mass of calcium carbonate into moles.
  3. Determine the number of moles of calcium oxide formed by using the stoichiometric ratio for calcium oxide and calcium carbonate based on the coefficient of the chemical equation.
  4. Convert the number of moles of calcium oxide into mass.

Solving the given problem using the steps above:

STEP 1: The balanced chemical equation for the given reaction is:

CaCO_{3} \rightarrow \ CaO \ + \ CO_{2}

STEP 2: Convert the mass of calcium carbonate into moles using the molar mass of calcium carbonate.

mol \ CaCO_{3} \ = 25 \ g \ CaCO_{3} \ (\frac{1 \ mol \ CaCO_{3}}{100.0869 \ g \ CaCO_{3}})\\ \\\boxed {mol \ CaCO_{3} \ = 0.2498 \ mol}

STEP 3: Use the stoichiometric ratio to determine the number of moles of CaO formed.

For every mole of calcium carbonate decomposed, one more of a calcium oxide is formed. Therefore,

mol \ CaO \ = 0.2498 \ mol

STEP 4: Convert the moles of CaO into mass of CaO using its molar mass.

mass \ CaO \ = 0.2498 \ mol \ CaO \ (\frac{56.0774 \ g \ CaO}{1 \ mol \ CaO})\\ \\mass \ CaO \ = 14.008 \ g

Since there are only 2 significant figures in the given, the final answer must have the same number of significant figures.

Therefore,

\boxed {mass \ CaO \ = 14 \ g}

Learn More

  1. Learn more about stoichiometry brainly.com/question/12979299
  2. Learn more about mole conversion brainly.com/question/12972204
  3. Learn more about limiting reactants brainly.com/question/12979491

Keywords: thermal decomposition, stoichiometry

5 0
3 years ago
Why carbon dioxide can be tested with the help of moist blue litmus paper ?<br>​
Evgesh-ka [11]

Answer:

carbon dioxide is acidic and when it comes in contact with blue litmus paper it turns red

Explanation:

4 0
3 years ago
Ion arrangements of three general salts are represented below. h5sil917 h5sil917021 h5sil91703 which ion arrangement has the hig
vovangra [49]
This question is incomplete. Luckily, I found the same problem which is shown in the attached picture. To answer the question, we must know how the size and charge affect the lattice energy. The answer is: lattice energy increases with the increasing charge of the ions, and decreasing radius of the atoms. <em>Therefore, the ranking would be: A < B < C</em>.

4 0
3 years ago
How does 2 Na (s) + Cl2 (g) = NaCl (s) represent the coefficient in the chemical equation
Elenna [48]

Answer:

The 2 would be placed in front of the reactant Na and in front of the product NaCl

2Na + Cl2 = 2NaCl

Explanation:

This is because the ratio of elements needs to be balanced on both sides.

On the reactants side, there are 2 Na molecules and 2 Cl molecules

On the products side, there are 2 Na molecules and 2 Cl molecules

So, now the equation is balanced

3 0
2 years ago
How many moles of sulfate ions are in a sample of aluminum sulfate in which the number of formula units is 7.534 × 1023?
valentina_108 [34]

Answer:a unit of grammatical organization next below the sentence in rank and in traditional grammar said to consist of a subject and predicate

Explanation:

7 0
3 years ago
Other questions:
  • Purple Group Header Warm-Up Why can I smell a chocolate bar even though it is a solid? Read the description of the office myster
    8·1 answer
  • The carbohydrates seen here contains 3 common elements.They are....
    11·2 answers
  • The percent of carbon in carbon monoxide, CO, is _____. The molar mass of carbon monoxide is 28.01 g/mol.
    9·1 answer
  • Looking at the periodic table, which of these elements has the smallest atomic radius?
    13·1 answer
  • If you were allowed to do a science project and it was about the nervous system, why would you do that topic
    12·2 answers
  • How are plastic containers different from paper containers? How are they the same?
    13·1 answer
  • 4. The nucleus of an atom is positively charged due to<br>A. electrons b. neutrons C. proton D. Ion​
    13·2 answers
  • A student is doing online research. The student's teacher said that some
    6·1 answer
  • How to convert 12g of H2O to moles
    10·1 answer
  • To make a softball bat, a block of wood is carefully crafted into a shape that will allow a
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!