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
mars1129 [50]
3 years ago
8

The oxidation of Cu₂O(s) to CuO(s) is an exothermic process:

Chemistry
1 answer:
Alex73 [517]3 years ago
8 0

Answer:

w = 7376.6 J

Explanation:

To calculate the work done in the system, we need first to calculate the number of moles of all compounds.

The following expression, that comes from the 1° law of thermodynamic, will help you to get the work:

w = ΔnRT

Where:

Δn: difference in the number of moles between products and reactants

R: constant universal of gases (8.314 J / mol K)

T: Temperature in Kelvin.

As we are doing this reaction in STP, then the Pressure is 1 atm, and temperature is 0 °C or 273 K.

Now, we already have the moles of Cu₂O, let's see, according to the balanced reaction, how many moles we should have of O₂ and CuO.

If 1 mole of O₂ reacts with 2 moles of Cu₂O then 6.5 moles of Cu₂O will be:

moles O₂ = 6.5 moles Cu₂O * (1 mole O₂/2 moles Cu₂O) = 3.25 moles O₂

If 2 moles of Cu₂O produces 4 moles of CuO, then 6.5 moles will be:

moles CuO = 6.5 moles Cu₂O*(4 moles CuO/2 moles Cu₂O) = 13 moles CuO

Now that we have the moles, let's calculate the value of Δn.

Δn = moles product - moles reactants

Δn = 13 - (6.5 + 3.25) = 3.25 moles

Now, we can calculate the work done in the system:

w = 3.25 * (8.314 * 273)

<h2>w = 7376.6 J or 7.3766 kJ</h2>

Hope this helps

You might be interested in
Describe how the size of sediment particles affects their movement during deflation.
lutik1710 [3]
The larger the piece the longer it will take to break down. This is because it has more mass that needs to be broken down. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
7 0
3 years ago
Read 2 more answers
When the Moon moves between the Sun and Earth and casts a shadow on Earth's surface, there is a(n)
allochka39001 [22]
Hi , the answer is D because the moon is blocking the sun s rays .
<span />
5 0
3 years ago
What does the law of reflection state?
Anestetic [448]

Answer:

B is the correct answer

7 0
2 years ago
Read 2 more answers
B. If the sand you ran across has a specific-heat capacity of 835 J/(kgºc),
Murrr4er [49]

Answer: 16700 Joules

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed = ?

m = mass of sand = 2 kg

c = heat capacity = 835J/kg^0C

Initial temperature  = T_i = 40^0C

Final temperature= T_f  = 50^0C

Change in temperature ,\Delta T=T_f-T_i=(50-40)^0C=10^0C

Putting in the values, we get:

Q=2kg\times 835J/kg^0C\times 10^0C

Q=16700J

16700 J of energy must be added to a 2-kilogram pile of it to increase its temperature from 40°C to 50°C

4 0
3 years ago
Which of the following is a physical property of water?
Kamila [148]
Water is NOT flammable.
6 0
3 years ago
Other questions:
  • What is the density of a sample of liquid that has a volume of 125 mL and a mass of 200 g?
    9·1 answer
  • Sulfur dioxide, SO2(g), can react with oxygen to produce sulfur trioxide, SO3(g), by the following reaction
    13·1 answer
  • Choose the covalent compounds from the following choices Br2 MgS SO2 KF
    7·1 answer
  • Vascular plants can be divided into three categories. These categories are
    11·1 answer
  • Convert 395 grams to kilograms. <br><br> 39500<br> 3.95<br> 3.95E-3<br> 0.395
    10·2 answers
  • The United States consumes more oil per day than any other country. What would most likely happen to oil prices and availability
    6·1 answer
  • How many atoms of oxygen are there in one molecule of carbon dioxide, if the chemical formula is CO2?
    8·2 answers
  • Describe the current model of the atom and the characteristics of each of the 3 subatomic particles. Be prepared to provide the
    5·1 answer
  • What is defined as the plants and animals and the physical surroundings, including the sun, air, soil, and water?
    9·1 answer
  • How would you prepared pure water from the mixture of impure water? explain with experiment.<br>​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!