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3 years ago

Consider the exothermic reaction

Chemistry

1 answer:

alisha [4.7K]3 years ago

4 0

Answer:

The answer to your question is -2855 J

Explanation:

Reaction

2C₂H₆ + 7O₂ ⇒ 4CO₂ + 6H₂O

Formula

Heat of reaction = ΔHrxn = ΣΔHrxn products - ΣΔHrxn reactants

Substitution

ΔHrxn = { 4(-393.5) + 6(-241.8)} - {2(-84.7) + 7(0)}

ΔHrxn = {-1574 -1450.8} - {-169.4}

ΔHrxn = -3024.8 + 169.4

ΔHrxn = -2855.4 J

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A textbook measures 250 mm long, 225 mm wide and 50 mm thick. What is the volume of this book in mm3? What is the volume of this

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Answer:

2.81 × 10⁶ mm³

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Explanation:

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Width (w): 225 mm

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2 years ago

A tank with volume of 2.4 cu ft is filled with Methane to a pressure of 1500 psia at 104 degrees F. Determine the molecular weig

Soloha48 [4]

Explanation:

It is known that equation for ideal gas is as follows.

PV = nRT

The given data is as follows.

Pressure, P = 1500 psia, Temperature, T = $104^{o}F$ = 104 + 460 = 564 R

Volume, V = 2.4 cubic ft, R = 10.73 $psia ft^{3}/lb mol R$

Also, we know that number of moles is equal to mass divided by molar mass of the gas.

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d = $\frac{PM}{RT}$

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3 years ago

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Explanation:

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3 years ago