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Nat2105 [25]
3 years ago
14

How many moles of H₂ are required to give off -9551 kJ of heat in the following reaction?

Chemistry
1 answer:
klasskru [66]3 years ago
6 0

Answer:

312.1 moles H₂ (4 sig.figs. based on -9551Kj value given).

Explanation:

Given N₂(g) + 3H₂(g) => 2NH₃(g);  ΔH° = -91.8Kj*

One mole of H₂ consumed will give -91.8Kj/3 = -30.6Kj/mole (exothermic)

moles H₂ consumed that gives -9551Kj (exothermic) = -9551Kj/-30.6Kj/mole H₂

= 312.124183moles H₂ (calculator answer) ≅ 312.1 moles H₂ (4 sig.figs. based on -9551Kj value given).

*Note: The ∆H° = -91.8 kJ/mol units should be only 'Kj' as the heat flow value applies to substances with three different coefficient values in the standard equation. FYI :-)  

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The temperature of a container of oxygen gas is increased from 149 k to 298 k which of the following statement is true
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3 years ago
A polar covalent bond will form between which two atoms?
Alex_Xolod [135]

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If, Electronegativity difference is,

 

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                Greater than 1.7 then it is Ionic

 

For Be and F,

                    E.N of Fluorine          =   3.98

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For H and Cl,

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                                                   ________

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For Na and O,

                    E.N of Oxygen          =   3.44

                    E.N of Sodium          =   0.93

                                                       ________

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For F and F,

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                    E.N of Fluorine          =   3.98

                                                        ________

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Result:

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5 0
3 years ago
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2 years ago
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Thus, the correct answer is - directly; Avogadro’s.

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