When $2$ $2$ moles of water are produced, the following reaction has an enthalpy change of reaction equal to $- 184 kJ$ $-"184 kJ"$ . How much water is produced when this reaction gives off $1950 kJ$ $"1950 kJ"$ of heat?

Question

$S i O_{2} + 4 H F \to S i F_{4} + 2 H_{2} O$ $SiO_2+4HFrarrSiF_4+2H_2O$

$DeltaH=-184"kJ"$

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Answer 1 · 2015-04-18T18:25:19

$381.5"g"$ must form.

$SiO_2+4HFrarrSiF_4+2H_2O$

$DeltaH=-184"kJ"$

$184"kJ"$ produced from forming 2 moles water (36g).

$184"kJ"rarr36"g"$

$1"kJ"rarr36/184"g"$

$1950"kJ"rarr(36)/(184)xx1950=381.5"g"$