Question

PART 2: MEASURING THE HEAT OF A REACTION - EXPERIMENTAL DATA Record in ink Magnesium Strip Data Length of Mg Ribbon 13 00e as of M Ribbon Strip 13-00 em Strip Heat of Reaction Data Trial 1 Trial 2 Trial 3 Trial 4 Length of Magnesium, Ribbon Sample 2. У се 2,7 cm 3. Че- у-5ca Mass of empty, dry primary Mass of 2 M HCI and primary calorimeter Perform temperature curve analysis as noted below Temperature of HCI at reaction start (from Vernier analysis) Temperature of mikture after reaction (from Vernier analysis) Temperature Curve Analysis: perform this part in the laboratory before leaving Using the Vernier software, perform the graphical analysis tasks described in Part 2 of the Data Analysis to Perform in Lab section. After using extrapolation to determine the temperatures of the HCl at reaction initiation and of the reaction mixture after reaction record these values in the data table above. Print out a copy of the Trial 1 temperature curve with the extrapolation lines. On your printout, indicate the time of mixing by drawing a vertical line on the graph. Next label AT of the reaction on your graph. Be sure to attach this graph to your report when you submit it for grading

average heat capcity of calorimeter is 3.47 J/g *C

Answer 1

(1). Length of Mg ribbon strip = 13.00 cm , mass of Mg ribbon strip = 0.109 g.

so , mass of Mg per unit length of the given Mg strip = (0.109) / (13) = 8.38*10^-3 g/cm .

(2). In trial-1 length of Mg ribbon used = 2.4 cm.

so, mass of Mg ribbon used in trial-1 = (2.4 cm)* (8.38*10^-3 g/cm) =0.0201 cm

In trial-2 length of Mg ribbon used = 2.7 cm

therefore , mass of Mg ribbon used in trial-2 = (2.7 cm) *(8.38*10^-3 g/cm) = 0.0226 g.

Similarly , mass of Mg used in trial-3 and trial-4 are 0.0285 g & 0.0377 g respectively.