W Week 13 6% 12/12/17 This is a Numeric Entry question/ It is worth 1 point/You

Question

W Week 13 6% 12/12/17 This is a Numeric Entry question/ It is worth 1 point/You huve unlimited attempts/There is no attempt penalty 03 Question (1 point) See page 625 1st attempt See Periodic Table See Hint A mixture of gaseous CO and Hacalled syenthesis gas is used commercially to prepare methunol (CH,OH a compound considered an alternative fuel to gasoline Under equilibrium conditions at 560.3 K(Ha1-0.07509 mol/L.(CO)-002923 mol/L and ICH OHI 0.0401 mol/L What is the value of K for this reaction at 560.3 K

Explanation / Answer

Write down the balanced chemical equation for the equilibrium as below.

CO (g) + 2 H2 (g) <======> CH3OH (g)

The equilibrium constant for the reaction is given as

Kc = [CH3OH]/[CO][H2]2

At 560.3 K, the equilibrium concentrations are given as

[CO] = 0.02923 mol/L; [H2] = 0.07509 mol/L and [CH3OH] = 0.0401 mol/L. Plug in the values of the equilibrium concentrations in the Kc expression and obtain

Kc = (0.0401)/(0.02923).(0.07509)2 = 243.305 243.30

Kc is an equilibrium constant and therefore, is dimensionless; hence, Kc will have no unit (ans).

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