B. hydrogen sulfide, h2s, is a contaminant in natural gas. it can be removed with the reaction ch4(g) + 2h2s(g) cs2(g) + 4h2(g), δh = 232 kj/mol. how should the following conditions of this reaction be changed to optimize the removal of h2s? explain your answers.

i. changing the pressure

ii. changing the temperature

iii. changing the h2 concentration

I. Changing the pressure:

II. Changing the temperature:

III. Changing the H₂ concentration:

Explanation:

Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

I. Changing the pressure:

For the reaction: CH₄(g) + 2H₂S(g) ⇄ CS₂(g) + 4H₂(g),

The reactants side (left) has 3.0 moles of gases and the products side (right) has 5.0 moles of gases.

II. Changing the temperature  

The reaction is endothermic since the sign of ΔH is positive.

CH₄(g) + 2H₂S(g) + heat ⇄ CS₂(g) + 4H₂(g).

The T is a part of the reactants, increasing the T increases the amount of the reactants. So, the reaction will be shifted to the right to suppress the effect of increasing T and the amount of H₂S(g) will decrease.

The T is a part of the reactants, increasing the T decreases the amount of the reactants. So, the reaction will be shifted to the left to suppress the effect of decreasing T and the amount of H₂S(g) will increase.

III. Changing the H₂ concentration:

H₂ is a part of the products.

H₂ is a part of the products, increasing H₂ increases the amount of the products. So, the reaction will be shifted to the left to suppress the effect of increasing H₂ and the amount of H₂S(g) will increase.

H₂ is a part of the products, decreasing H₂ decreases the amount of the products. So, the reaction will be shifted to the right to suppress the effect of decreasing H₂ and the amount of H₂S(g) will decrease.

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

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