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Mama L [17]
3 years ago
6

In the reaction 2k (s) + 2h2oh (aq) + h2 (g) which of the reactants is a solid

Chemistry
1 answer:
Y_Kistochka [10]3 years ago
4 0
Answer is A. Because K is potassium which is a metal
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Answer:

D) This reaction will be nonspontaneous only at high temperatures.

Explanation:

According the equation of Gibb's free energy -

∆G = ∆H -T∆S

∆G = is the change in gibb's free energy

∆H = is the change in enthalpy

T = temperature

∆S = is the change in entropy .

And , the sign of the  ΔG , determines whether the reaction is Spontaneous or non Spontaneous or at equilibrium ,

i.e. ,

if

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The reaction has the value for ∆H = negative , and ∆S = negative ,

Now ,

∆G = ∆H -T∆S

     = ( - ∆H ) - T( - ∆S )

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Now, for making the reaction Spontaneous ΔG = negative ,

Hence ,

The temperature is low, then the value for  ΔG will be negative , i.e. , Spontaneous reaction .

And , vice versa , at higher temperature , the reaction will have ΔG positive , and the reaction will be non -Spontaneous reaction .

The standard free energy of formation will be zero , only for the compounds that are in their pure form ,

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A student states that an exothermic chemical reaction can transfer its heat only by convection and conduction. Which disproves t
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(a)- Time

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The gas phase reaction, A2 + B2 ----&gt;2AB, proceeds by bimolecular collisions between A2 and B2 c,o(\'e'9 molecules. The rate
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Answer:

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Order of in the mass action law is the coefficient which is raised to the active concentration of the reactants. It is experimentally determined and can be zero, positive negative or fractional.

The order of the whole reaction is the sum of the order of each reactant which is raised to its power in the rate law.  

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So, r'=k[A'_2][B'_2]=k\times 2[A_2]\times 2[B_2]=4\times k[A_2][B_2]=4r

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