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andrey2020 [161]
3 years ago
12

Hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer indu

stries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 127 kJ is given off per mole of C2H4 reacting, how much heat (in kJ) is released when 10.1 kg of C2H6 forms? Enter a positive number since released implies a negative number. Enter to 0 decimal places.
Chemistry
1 answer:
gayaneshka [121]3 years ago
3 0

Answer:

42672 kJ

Explanation:

Chemical reaction:

C₂H₄ + H₂ → C₂H₆ + heat

Now we calculate the number of moles of ethane C₂H₆:

number of moles = mass / molecular weight

number of moles of ethane = 10.1 / 30 = 0.336 kmoles = 336 moles

And determine the heat released:

if      127 kJ are released when 1 mole of C₂H₆ is produced

then X kJ are released when 336 moles of C₂H₆ is produced

X = (127 × 336) / 1 = 42672 kJ

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\\ \tt\hookrightarrow 2C_4H_10+13O_2\longrightarrow 8CO_2+10H_2O

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\\ \tt\hookrightarrow \dfrac{Given\:mass}{Molar\:mass}

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Now

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If one iron nail weighs 2.0 grams, what would be the mass of 6.022 x 10^23 nails?
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Hello!

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