2007-01-10 01:22:39 · 4 answers · asked by Crazzzzzy 2 in Science & Mathematics ➔ Other - Science
In an EXPERIMENT you would do a preliminary calculation and then MEASURE the heat evolved.
First find the number of moles.
Find the mole fraction to determine the limiting reagent.
(once a reactant is used up there will be no more reaction)
∆Hºreaction = ∑ n ∆Hºformation (products) - ∑ m ∆Hºformation (reactants)
Then find a table of heats of formation and substitute the numbers in to the above equation.
The reaction is:
H2SO4 + Mg -> MgSO4 + H2
(potentially explosive gas will be evolved)
MgSO4 is epsom salt FYI
If Magnesium is the limiting reagent then you would need to also figure that you will probably also get Mg(HSO4)2 Magnesium bisulfate as part of the products and then you have a complicated but not insoluble problem. (Use pKa's)
2007-01-10 02:02:27 · answer #1 · answered by Anonymous · 0⤊ 0⤋
You can conduct the reaction in a calorimeter and measure the temperature change of the solution as the reaction occurs.
2007-01-10 01:40:10 · answer #2 · answered by hcbiochem 7 · 0⤊ 0⤋
i dont kno
2007-01-10 02:01:08 · answer #3 · answered by Anonymous · 0⤊ 0⤋
add them both
2007-01-10 01:31:06 · answer #4 · answered by Anonymous · 0⤊ 0⤋