Reactions involving gold have been of particular intrests to alchemists. Consider the following reactions ,
`Au(OH)_(3)+4HCl toHAuCl_(4)+3H_(2)O`,
`" "DeltaH=-28kcal`
`Au(OH)_(3)+4HBr toHAuBr_(4)+3H_(2)O`
`" "DeltaH=-36.8kcal`
In an experiment there was an absorption of 0.44 kcal when one mole of `HAuBr_(4)` was mixed with 4 moles of HCl. Then the fraction `HAuBr_(4)` converted into `HAuCl_(4)` : (percentage conversion)