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Verdich [7]
3 years ago
7

5)a strip of paper has a length of 14cm what is the lengh of the strip of paper in mm, and in km

Chemistry
1 answer:
I am Lyosha [343]3 years ago
7 0
A) 1 cm ---------- 10 mm
    14 cm ---------- ?

14 x 10 / 1 => 140 mm
-------------------------------------------------------

b) 1 cm ----------- 0.00001 km
    14 cm ---------- ?

14 x 0.00001 / 1 => 0.00014 km

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Answer:

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ΔHr: 2ΔHf Hg(l) + ΔHf O₂(g) - 2ΔHf HgO(s)

As ΔHf of Hg(l) and ΔHf O₂(g) are 0:

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<u><em /></u>

In the same way ΔSr is:

ΔSr= 2ΔS° Hg(l) + ΔS° O₂(g) - 2ΔS° HgO(s)

ΔSr= 2* 76,02J/Kmol + 205,14 J/Kmol - 2*70,19 J/Kmol

ΔSr= 216,8 J/Kmol = <em><u>0,216 kJ/Kmol</u></em>

Thus, ΔGr at 298K is:

ΔGr = 181,66 kJ/mol - 298K*0,216kJ/Kmol

ΔGr = +117,3 kJ/mol ≈ <em>4. +117,1 kJ/mol</em>

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I hope it helps!

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