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Butoxors [25]
4 years ago
9

Determine the equilibrium constant for the following reaction at 549 K. CH2O(g) + 2 H2(g) → CH4(g) + H2O(g) ΔH° = -94.9 kJ; ΔS°=

-224.2 J/K Determine the equilibrium constant for the following reaction at 549 K. CH2O(g) + 2 H2(g) → CH4(g) + H2O(g) ΔH° = -94.9 kJ; ΔS°= -224.2 J/K 1.07 x 109 481 2.08 x 10-3 9.35 x 10-10 1.94 x 10-12
Chemistry
1 answer:
Dominik [7]4 years ago
8 0

Answer:

The equilibrium constant of the reaction is 2.08\times 10^{-3}.

Explanation:

Formula used:

\Delta G^o=\Delta H^o-T\Delta S^o

\Delta G^o=-RT\ln K_1

where :

\Delta G^o = Gibbs free energy

\Delta H^o = Enthalpy of reaction

\Delta S^o = Entropy of reaction

R = Gas constant = 8.314J/K mol

T = Temperature in Kelvins

K_1 = equilibrium constant at T

So we have:

\Delta G^o = ?

\Delta H^o = -94.9 kJ/mol = -94900 J/mol

\Delta S^o = -224.2 J/mol K

T = 549 K

\Delta G^o=-94900 J/mol-549\times ( -224.2 J/mol K)=28,185.8 J/mol

\Delta G^o=-RT\ln K_1

28,185.8 J/mol=-8.314J/K mol\times 549 K\times \ln K_1

K_1=0.002080=2.08\times 10^{-3}

The equilibrium constant of the reaction is 2.08\times 10^{-3}.

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Hope this helps.

7 0
3 years ago
Sodium metal and water react to create sodium hydrogen and hydrogen gas through the unbalanced equation.
Maurinko [17]

Answer:

Theoretical yield = 2.5 g

Explanation:

Given data:

Mass of sodium = 79.7 g

Mass of water = 45.3 g

Theoretical yield of hydrogen gas = ?

Solution:

Chemical equation:

2Na + 2H₂O → 2NaOH + H₂

Number of moles of sodium:

Number of moles = mass/ molar mass

Number of moles = 79.7 g / 23 g/mol

Number of moles = 3.5 mol

Number of moles of water:

Number of moles = mass/ molar mass

Number of moles = 45.3 g / 18g/mol

Number of moles = 2.5 mol

Now we will compare the moles of hydrogen gas with water and sodium.

                        H₂O           :             H₂

                           2             :              1

                          2.5           :            1/2×2.5 =1.25 mol

                     

                           Na           :              H₂

                             2            :               1

                           3.5           :             1/2×3.5 =1.75 mol

water will be limiting reactant.

Theoretical yield:

Mass = number of moles × molar mass

Mass =  1.25 mol  × 2 g/mol

Mass = 2.5 g

8 0
3 years ago
How many moles of Al are needed to react exactly with 10.00 moles of Fe2O3 according to the following
4vir4ik [10]

Answer:

Answer is B) 20.0 moles

Explanation:

From the equation,

1 mole of Fe2O3 = 2 moles of Al

therefore 10.0 moles of Fe2O3 = 10×2

= 20.0 moles.

3 0
3 years ago
HELP PLZ!!!
NikAS [45]

Answer:

Approx. 8 grams of KNO3 will not dissolve

Explanation:

According to the curve at 20 degrees C only 32 grams of KNO3 can dissolve in 100 grams of water meaning if you hvae 40 grams of KNO3 in water at 20 degrees C ; 40-32= 8

8 0
3 years ago
Are cell phones scientific
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Yes hope this helps you
6 0
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