Consider the chemical equation 2NH3 ? N2 + 3H2. the equilibrium is to be established in...

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Chemistry

Consider the chemical equation 2NH3 ? N2 + 3H2. the equilibriumis to be established in a 1 liter container at 1,000 K, where Kc=4.0*^-2. Initially1,220 moles of NH3 are present. Estimateequilibrium concentration of H2.

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Solution

Given data

Kc =4.0*10^-2

Initial moles of NH3 = 1220

Equilibrium concentration of H2= ?

Lets make the ICE table

Â Â Â 2NH3 ------ > N2 + 3H2

IÂ Â 1220 MÂ Â Â Â Â Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â Â Â Â Â

CÂ Â -2xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +xÂ Â Â Â Â Â Â Â Â Â Â +3x

EÂ Â 1220-xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â xÂ Â Â Â Â Â Â Â Â Â Â Â Â 3x

Lets write the equilibrium constant expression

Kc =[N2][H2]³/[NH3]²

Now lets out the values in the formula

4.0*10^-2 = [x][3x]³/[1220-2x]²

4.0*10^-2 *[1220-2x]²=[x][3x]³

By solving this equation we get

X= 1.16

Therefore the equilibrium concentration of H2 = 3x = 3*1.16 = 3.48 M

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Consider the chemical equation 2NH3 ? N2 + 3H2. the equilibrium is to be established in...

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70.2K

Verified Solution

Question

Chemistry

Consider the chemical equation 2NH3 ? N2 + 3H2. the equilibriumis to be established in a 1 liter container at 1,000 K, where Kc=4.0*^-2. Initially1,220 moles of NH3 are present. Estimateequilibrium concentration of H2.

Answer & Explanation Solved by verified expert

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