How can a redox reaction be used as a source of electrical energy?
Answers
Explanation:
Electrical energy is the energy produced due to flow of electrons.
Whereas a reaction in which oxidation and reduction reaction takes place is known as a redox reaction. Basically, there is exchange of electrons that take place in a redox reaction.
For example,
Oxidation half reaction:
Reduction half reaction:
Hence, this flow of electrons acts as a source of electrical energy.
Related Questions
How many identical double strands of DNA will be present after three rounds of replication?four six eight nine
The carbon cycle involves an exchange of carbon between ___ a. the geosphere and atmosphere b. the atmosphere and hydrosphere c. the geosphere and hydrosphere d. the geosphere, hydrosphere, and atmosphere
What minimum volume of 0.200 m potassium iodide solution is required to completely precipitate all of the lead in 195.0 ml of a 0.194 m lead(ii) nitrate solution?
The process of seeking facts that will lead to the truth is called _____.a. studyb. researchc. intuition
Answers
Answer:
Option 2
In process I & II entropy of the system increases proceed from left to right.
Explanation:
Entropy is an extensive property of the system. It means it depends on the amount or quantity of the system
In case for process 1
since one mole sodium chloride dissolve in water and it dissociate into two ions i.e. Na⁺ and Cl⁻
For process 2
CaCO₃(s) → CaO(s) + CO₂(g)
Change in gaseous moles = (Product moles - reactant moles)
⇒ Δng = 1
Since Δng > 0 it means randomness increases of the system from left to right. So, ΔS > 0
Final answer:
Processes I (dissolving NaCl) and II (decomposition of CaCO3) show an increase in entropy, whereas process III (freezing water) shows a decrease. Therefore, the entropy of the system increases for processes I and II, not III.
Explanation:
The student has asked which processes have an increasing entropy as they proceed from left to right. Entropy is a measure of the disorder or randomness in a system, and changes in entropy can be predicted based on phases changes, the dispersion of matter, and the change in the number of particles in a system.
For the process of dissolving NaCl (s) into Na+(aq) and Cl-(aq), entropy increases due to the dispersion of the solid into ions, hence increasing the randomness of the system. Therefore, process I has an increasing entropy. In process II, we have CaCO3 (s) decomposing into CaO (s) and CO2 (g), leading to an increase in the number of gaseous molecules, which significantly increases entropy compared to the original solid state. Lastly, process III involves the transition of H2O (l) into H2O (s), which means that water is going from a more disordered liquid state to a more ordered solid state, decreasing the entropy of the system.
Considering these details, the entropy increases for processes I and II but decreases for process III. Therefore, the correct answer to the student's question is option 2, which indicates that entropy increases for processes I and II.
Learn more about Entropy Change here:
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B. protons; neutrons
C. neutrons; electrons
Answers
Answer: Option (B) is the correct answer.
Explanation:
Atomic mass is defined as the summation of total number of protons and neutrons present in an element.
On the other hand, atomic number means the total number of protons present in an element.
For example, atomic number of sodium is 11 and number of neutrons present in it are 12.
Hence, atomic mass of sodium = no. of protons + no. of neutrons
= (11 + 12) amu
= 23 amu
Therefore, we can conclude that the atomic mass of an element can be approximated by adding the number of protons plus the average number of neutrons.
0.100 moles of Co2
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two moles of O =32
so one mole of CO^2 is44 grams
.1 moles or 1/10 moles of 44 grams is 4.4 grams
Answers
Answer : The value of the rate constant for the forward reaction at 700 K is,
Explanation :
The given chemical equilibrium reaction is:
The expression for equilibrium constant is:
The expression for rate of forward and backward reaction is:
and,
As we know that at equilibrium rate of forward reaction is equal to rate of backward reaction.
Given:
Now put all the given values in the above expression we get:
Therefore, the value of the rate constant for the forward reaction at 700 K is,
G. Does the material feel hard to the touch?
H. Will the material float in water?
J. Does the material feel rough or smooth?
Answers
Answer:
i think the answer is f as metals are malleable and ductile
Answer:
F
Explanation: Most metals carry the trait that they are malleable and ductile.
Answers
Explanation:
The principle used in the preparation of these salts is to dissolve
the cystine in an alcoholic alkali solution to which just sufficient
water to effect solution has been added, and, after filtering from
excess cystine, to precipitate the salt by addition of a suitable
indifferent solvent. While various solvents, such as acetone,
ether, or large amounts of alcohol caused precipitations, these were
either oily or amorphous. Only acetonitrile was found to possess
the power of initiating regular crystallization in the salt solutions.
While the solutions of the different salts require different amounts
of the solvent for complete precipitation, a partial substitution of
absolute ether for acetonitrile was found expedient in the case
of the most soluble of the salts, the K salt.
Answer:
It is simply a process of forming crystal.
Explanation: When salt is heated and dissolve in the liquid mainly water then its called saturated solution. When we further add salt and increase heat in order to dissolve it then it forcibly dissolve in liquid it's called supersaturated solution. After we slowly cool down the temperature then the salt we have put in supersaturated solution arises in the form of crystal. Hence its called crystalization.