Given the following thermochemical equation:

Question

2 SO2 + O2 => 2 SO3 + 4300 kJ

What is the heat change in kJ accompanying the production of 43.0 grams of SO3?

Answer 1

So 4300 kJ heat us released upon the formation of 2*80 or 160 g SO3. Use a proportion or this.
4300 kJ x (43.0/160) = ?

The proportion would look like this
(4300/160) = (x/43.0) and solve for x.

Answer 2

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