Question

Part A, the reaction of Mg(s) with excess HCI Mass of Mg (g) Moles Mg (mole) g solution Ccalorimeter (J/°C (g solution x 4.184) ?T (from graph) qp (J) = Ccalorimeter?T Use sig. figs. rule: express answer in scientific notation! q(kJ) ?Hreaction (kJ/mol) = qp/(moles Mg) Average ?H (kJ/mol) Trial 1 0.41 200 g 200 x 4.184 = 836.8 Trial 2 Trial 3 (if time available) 0.405 200 g 200 x 4.184 = 836.8

          Part A, the reaction of Mg(s) with excess HCI
Mass of Mg (g)
Moles Mg (mole)
g solution
Ccalorimeter (J/°C
(g solution x 4.184)
?T (from graph)
q<sub>p</sub> (J) = C<sub>calorimeter</sub>?T
Use sig. figs. rule: express
answer in scientific notation!
q(kJ)
?H<sub>reaction</sub> (kJ/mol) =
q<sub>p</sub>/(moles Mg)
Average ?H (kJ/mol)
Trial 1
0.41
200 g
200 x 4.184 = 836.8
Trial 2
Trial 3 (if time
available)
0.405
200 g
200 x 4.184 = 836.8

Part A, the reaction of Mg(s) with excess HCI
Mass of Mg (g)
Moles Mg (mole)
g solution
Ccalorimeter (J/°C
(g solution x 4.184)
?T (from graph)
q<sub>p</sub> (J) = C<sub>calorimeter</sub>?T
Use sig. figs. rule: express
answer in scientific notation!
q(kJ)
?H<sub>reaction</sub> (kJ/mol) =
q<sub>p</sub>/(moles Mg)
Average ?H (kJ/mol)
Trial 1
0.41
200 g
200 x 4.184 = 836.8
Trial 2
Trial 3 (if time
available)
0.405
200 g
200 x 4.184 = 836.8

Added by Jennifer K.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Thanks for your feedback!

Part Athe reaction of Mg(swith excess HCl Trial1 Trial2 Trial3if time available) Mass of Mgg 1h-0 0405 Moles Mgmole g solution 2009 2009 CcalorimterJ/C g solution 4.184 200X4184836.8 T(from graph qpJ=CcalorimeterT Use sig.figs.rule:express answer in scientific notation! 200x4:184=836.8 q(k) HreactionkJ/mol= q/moles Mg Average AH (kJ/mol)