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zysi [14]
3 years ago
10

2C(s) + 2H2(g) → C2H4(g): ΔH = +52.4 kJ/mol Which statement about this reaction is correct?

Chemistry
1 answer:
artcher [175]3 years ago
6 0
<h3><u>Answer;</u></h3>

26.2 kJ of energy are absorbed for every mole of carbon reacted

<h3><u>Explanation;</u></h3>
  • ΔH is the enthalpy change which is given by subtracting the energy of reactants from the energy of products.
  • That is; ΔH = energy of products - energy of reactants
  • <u>In this case, it means that C2H4 has more energy than the the reactants. 52.4 J of energy to be precise, this energy is absorbed during the reaction.</u>
  • <u>However, Two moles of Carbon  require that much energy, thus one mole will require only 26.2 to react. </u>
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The answer for the following problem is mentioned below.

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Explanation:

Given:

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pressure (P) = 250 k Pa =250×10^3 Pa

temperature(t) = 54°C =54 + 273 = 327 K

Also given:

R = 8.31JK-1 mol-1 ,

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We know;

According to the ideal gas equation,

<u><em>P × V = n × R × T</em></u>

here,

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Therefore,

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V = ( 17 × 8.31 × 327 ) ÷ ( 250×10^3 )

V = 184.78 × 10^-3 liters

<u><em>Therefore volume occupied by methane gas is  184.78 × 10^-3 liters </em></u>

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What electron could have quantum numbers n = 2, l = 1, ml = 0, ms = +?
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The magnetic quantum number<span>, </span><span>ml, show</span> orbital<span> in which the electron is located, ml = -l...+l, ml = 0  is pz orbital.</span>

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