CHEMISTRY HIGH SCHOOL

Consider a generic redox reaction?Consider a generic redox reaction X(s) + Y^+(aq) <----> X^+(aq) + Y(s) then suppose that the coefficients in the redox reaction are doubled. How will the following quantities be affected for a voltaic cell under nonstandard conditions? 1.Doubled 2. Halved 3. Squared 4. No Change The options are InQ, E^o, E, n, Q

Answers

Answer 1
Answer: The Nernst equation allows us to predict the cell potential for voltaic cells under conditions other than the standard conditions of 1M, 1 atm, 25°C. The effects of different temperatures and concentrations may be tracked in terms of the Gibbs energy change ΔG. This free energy change depends upon the temperature & concentrations according to   ΔG = ΔG°  +  RTInQ  where ΔG° is the free energy change under conditions and Q is the thermodynamic reaction quotient. The free energy change is related to the cell potential  Ecell by ΔG= nFEcell

so for non-standard conditions
              -nFEcell = -nFE°cell  + RT InQ

or
   
              Ecell  =  E°cell - RT/nF (InQ) 

which is called Nernst equation.
Answer 2
Answer:

Answer:

n and lnQ - doubled

Q - Squared

E, Edegree - No change

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Answer:

hi

Explanation:

A particle that orbits the nucleus in an atom is called an

Answers

Good Morning

Answer : A particle that orbits the nucleus in an atom is called an Electron


Hint : Electron, negatively charged particle orbiting the nucleus. Same number as protons in neutral atoms


I hope that's help !


Happy Sunday :)
This would be a proton.It has a positive charge and is found in the nucleus. Don't get it confused with an electron this is not inside the nucleus but floats around the nucleus.

compared to the melting points of ionic compounds, the melting point of molecular solids tend to be...

Answers

Explanation:

Ionic compounds are the compounds formed by transfer of electrons between its atoms. Atoms of ionic compounds have opposite charge and that is why these atoms are held together by strong forces of attraction.

As a result, melting point of ionic compounds is high.

Whereas molecular solids are attached by weak Vander waal forces, that is, melting point of molecular solids is low.

Thus, we can conclude that compared to the melting points of ionic compounds, the melting point of molecular solids tend to be low.

What does it mean in terms of strength when the ph of an acid changes from 5 to 4?

Answers

If the pH of acid changes from 5 to 4, it means the level of acidity has increases.  There is increased Hydrogen ion concentration.

Given any two elements within a group, is the element with the larger atomic number likely to have a larger or smaller atomic radius than the other element

Answers

Answer:

Atomic radius of sodium = 227 pm

Atomic radius of potassium = 280 pm

Explanation:

Atomic radii trend along group:

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

Consider the example of sodium and potassium.

Sodium is present above the potassium with in same group i.e, group one.

The atomic number of sodium is 11 and potassium 19.

So potassium will have larger atomic radius as compared to sodium.

Atomic radius of sodium = 227 pm

Atomic radius of potassium = 280 pm

An experiment applies heat to a substance and produces a gas that is a new and different substance. Choose the true statement.A. This represents a physical change only.
B. This represents a chemical change only.
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Answers

I believe it is C; reasoning being that the hint for physical change is," the producing of a gas," chemical "that's new and diff. substance. "
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