A chemical engineer is studying the following reaction: H 2 (g) + Cl 2 (g) right

Question

A chemical engineer is studying the following reaction: H 2 (g) + Cl 2 (g) rightarrow 2HCl (g) M the temperature the engineer picks, the equilibrium constant K for this reaction is 1.6 The engineer charges ("fills") three reaction vessels with hydrogen and chlorine, and lets the reaction begin. He the :composition of the mixture inside each vessel from time to time. His first set of measurements are shown in the tat Predict the changes in the compositions the engineer should expect next time he measures the compositions.

Explanation / Answer

For Vessel A:

Q=PHCl2/PH2*PCl2

=4.332/3.98*1.82

=2.59

As Q>Kp

Thus Conc of:

H2 increases

Cl2 increases

HCl decreses

Similarly, for vessel B:

Q=1.6

As Q=K

Thus Conc of:

H2 no change

Cl2 no change

HCl no change

Similarly, for vessel B:

Q=0.8

As Q<K

Thus Conc of:

H2 decreases

Cl2 decreases

HCl increases

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