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vladimir2022 [97]
2 years ago
9

What is the molecular mass

Chemistry
1 answer:
Nutka1998 [239]2 years ago
5 0
100.08 is the molecular mass.
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Explanation:

The reaction is as follows.

       CH_{3}CH_{2}OH(g) + 3O_{2}(g) \rightarrow 2CO_{2} + 3H_{2}O(g)

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Hence, calculate the change in enthalpy of the reaction as follows.

 \Delta H_{rxn} = \sum \text{bond energy of reactants} - \sum \text{bond energy of products}

= [5(C-H) + 1(C-C) + 1(C-O) + 1(O-H) + 3(O=O)] - [4(C=O) + 6(O-H)]

 = [5 \times 414 + 1 \times 347 + 1 \times 360 + 1 \times 464 + 3 \times 498] kJ - [4 \times 799 + 6 \times 464]kJ

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