Question
Asked Nov 25, 2019
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Given the following reaction, what volume of oxygen would be needed to react with 250. grams of propane at 551 °C and 0.976 atm?
C3H8 (g) + 5 O2 (g) -> 3 CO2 (g) + 4 H2O (g)

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Expert Answer

Step 1

As we know, 1 mole of propane requires = 5 moles O2

The molecular mass of propane (C3H8) = 44 g

So, 44 g propane requires = 160 g of O2

Then, 250 g of propane requires,

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250 = 909 g at STP 44 160 x

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Step 2

So, 909 g of O2 has a volume of,

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909 =22.4 x 28.4 32 22.4 =636.16 L

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Step 3

Given, P = 0.976 atm, T = 824 K, V = ?

P° = 1 atm, T = 273 K, V ...

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P'V PV T т P'V T V = т х TР P 1 atm x 636.16 L V = 824 K 0.976 atm 273 K V 1967.34 L

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