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erma4kov [3.2K]
3 years ago
15

How much heat is absorbed when 30.00 g of C(s) reacts in the presence of excess SO2(g) to produce CS2(l) and CO(g) according to

the following chemical equation?
5 C(s) + 2 SO2(g) → CS2(l) + 4 CO(g) ΔH° = +239.9 kJ
Chemistry
1 answer:
Gnoma [55]3 years ago
4 0

Answer:

120.0 kJ

Explanation:

  • First we convert the given mass of C to moles:

30.00 g C ÷ 12g/mol = 2.5 mol

  • The ΔH° value given by the problem, is the heat absorbed when 5 moles of C react.

So when we have<u> half the moles of C</u> (2.5 instead of 5.0), t<u>he heat absorbed will also be half</u>, thus the answer is:

  • 239.9 kJ / 2 = 120.0 kJ
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