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Keith_Richards [23]
3 years ago
9

Are these ramen noodles expired?

Chemistry
2 answers:
laiz [17]3 years ago
6 0

Answer:

i think so

Explanation:

just eat them anyways

Zigmanuir [339]3 years ago
4 0

Answer: Yes they are

Explanation: Where's the picture?

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A scientist measures the standard enthalpy change for the following reaction to be 67.9 kJ:
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-252.5 kJ/mol = ΔH H2O(g)

Explanation:

ΔH Fe2O3 = -825.5kJ/mol

ΔH H2 = 0kJ/mol

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Based on Hess's law, ΔH of a reaction is the sum of ΔH of products - ΔH of reactants. For the reaction:

Fe2O3(s) + 3 H2(g) →2Fe(s) + 3 H2O(g)

ΔHr = 67.9kJ/mol = 3*ΔH H2O + 2*ΔHFe - (ΔH Fe2O3 + 3*Δ H2)

67.9kJ/mol = 3*ΔH H2O + 2*0kJ/mol - (ΔH -825.5kJ/mol + 3*Δ H2)

67.9 = 3*ΔH H2O(g) + 825.5kJ/mol

-757.6kJ/mol = 3*ΔH H2O(g)

<h3>-252.5 kJ/mol = ΔH H2O(g)</h3>
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