Chemistry, 28.01.2020 04:31 christianlover20

Consider the steps in coal gasification: c(coal) + h2o(g) → co(g) + h2(g) δh°rxn = 129.7 kj co(g) + h2o(g) → co2(g) + h2(g) δh°rxn = -41 kj co(g) + 3h2(g) → ch4(g) + h2o(g) δh°rxn = -206 kj calculate the heat of reaction, δh°rxn, for overall reaction for the production of methane, ch4.

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Answer from: QueenYaya

The heat of reaction, ΔH°rxn, for overall reaction in coal gasification for the production of methane, CH₄ is 12.4 kJ

From the question,

We are to determine the heat of reaction for overall reaction for the production of methane in coal gasification

The equation for the reaction of coal gasification is

2C(coal) + 2H₂O → CO₂ + CH₄

From the question,

We have the following equations of reactions

(1) C(coal) + H₂O(g) → CO(g) + H₂(g) ΔH°rxn = 129.7 kJ

(2) CO(g) + H₂O(g) → CO₂(g) + H₂(g) ΔH°rxn = -41 kJ

(3) CO(g) + 3H₂(g) → CH₄(g) + H₂O(g) ΔH°rxn = -206 kJ

Multiply (1) by 2 to get

(4) 2C(coal) + 2H₂O(g) → 2CO(g) + 2H₂(g) ΔH°rxn = 259.4 kJ

Now, adding equations (2), (3), and (4), we get

(2) CO(g) + H₂O(g) → CO₂(g) + H₂(g) ΔH°rxn = -41 kJ

(3) CO(g) + 3H₂(g) → CH₄(g) + H₂O(g) ΔH°rxn = -206 kJ

(4) 2C(coal) + 2H₂O(g) → 2CO(g) + 2H₂(g) ΔH°rxn = 259.4 kJ

2C(coal) + 2H₂O(g) → CH₄(g) + CO₂(g) ΔH°rxn = 12.4 kJ

Hence, the heat of reaction, ΔH°rxn, for overall reaction in coal gasification for the production of methane, CH₄ is 12.4 kJ

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Answer from: Vimmia

The answer to your question is ΔHrxn = 0 kJ

Explanation:

Process

1.- Multiply Equation 1 by 2

2C(coal) + 2H₂O ⇒ 2CO (g) + 2H₂ ΔH rxn = 259.4 kJ

2.- Sum equation 2

CO(g) + H₂O ⇒ CO₂ (g) + H₂ (g) ΔHrxn = -41 kJ

Result

2C + 3H₂O + CO ⇒ 2CO + 3H₂ + CO₂ ΔHrxn = 218.4 kJ

Simplification

2C + 3H₂O ⇒ CO + 3H₂ + CO₂

3.- Sum equation 3

CO(g) + 3H₂ (g) ⇒ CH₄ (g) + H₂O (g) ΔHrxn = -218.4 kJ

Result

2C + 3H₂O + 3H₂ + CO ⇒ CO + 3H₂ + CO₂ + CH₄ + H₂O

Simplification

2C + 2H₂O ⇒ CO₂ + CH₄ ΔHrxn = 0 kJ

Answer from: Quest

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

Answer from: Quest

the correct answer is:

a. formation of precipitation

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Consider the steps in coal gasification: c(coal) + h2o(g) → co(g) + h2(g) δh°rxn = 129.7 kj co(g) +...

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