Question

SiH4(g) + 2 F2(g) SiF4(g) + 4 HF(g)

If 18.9 kJ are released when 1.10 g of F2 reacts with an excess of SiH4, what is the heat of the reaction when 1.20 moles of F2 react?
bobpursley
The only way to compare 1.10g to 1.20 moles is to change one of them to grams/moles.
1.20moles F2=1.2*38=45.6 grams.

Heat= 18.9kJ * 45.6/1.10

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