The research and development unit of a chemical company is studyingthe reaction

Question

The research and development unit of a chemical company is studyingthe reaction of CH4 and H2S,
two components of natural gas.

CH4(g) + 2 H2S(g) CS2(g) + 4 H2(g)

In one experiment, 1.00 mole of CH4, 1.00 mole of CS2, 2.00 molesof H2S, and 2.00 moles of H2 are mixed in a 250-mL vessel at 9600C.At this temperature, Kc = 0.36.
In which direction will the reaction proceed to reachequilibrium?

a). left
b). right
c). Neither, it will stay the same
d). Initially right, then left
e). Initially left, then right

Explanation / Answer

                                                          CH4(g) + 2 H2S(g) CS2(g) + 4 H2(g)                                           mols           1.00      2.00              1.00        2.00                                                             Qc = ( 1.00 )( 2.00 ) ^ 4 / ( 1.00 )( 2.00 )^ 2                                                                   = 4                                                              Kc = 0.36 As Q > Kc , equilibrium shifts towards left .

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