The Fundamentals of Calorimetry
Katie Letson
11/20/2022
CAROLINA
1
Data
Activity 1
Data Table 1
Trial 1 Temp. C 27 27 26 25 25 24 24 23.5
Trial 2 Temp. .c 28 28 28
Time (min)
Trial 1
Trial 2
Initial temperature of cold water, T.
15.8333 3C
15C
1
Initial temperature 40C 42.5C of warm water, Tn Average 24.75C 27C temperature, Ta Temperature at time 0 from graph, 27.433C 28.667C To Heat lost by water in J to calorimeter 28.006J 208.951 (q) Heat capacity (C) of 1.9 J/C 13.2 J/'C calorimeter in J/'c Average Heat capacity (C) of 7.55 J/'C calorimeter in J/'c
2 3 4 5
27.5
27.5 27 26.5 26 26 25.5
6 7 8
9 10
23 23
*Note that the Average Heat Capacity (C) calculated above is used in Activities 2 and 3.
2016 Carolina Biological Supply Company
2
1. Create a spreadsheet and graph of the data from Data Table 1, plotting temperature vs. time, and use the Y intercept to find the temperature at time 0 when the two volumes of water are mixed.
a. Insert graph below.
Temp. VS Time By: Katie Letson 11/21/2022
y = -0.503x + 28.657
Activities 2 and 3
Data Table 2
10g CaCl2 100g
15g CaCl2 100g
5g NH4CI 100g
10g NH4CI 100g
15g NH4CI 100g
5g CaCIz
Mass of 100g water (g) Mass of salt 5g 10g (g) Moles of salt 0.045mol 0.090mol (g x mol/g) Initial Temperature 16.1111C 15.556C (C) T: Final Temperature 22.2222C 27.778C (C) Tf Change in Temperature 6.1111C 12.222C (C) T = Tf - Ti @ 2016 Carolina Biological Supply Company
15g
5g
10g 15g 0.187mo 0.135mol 0.093mol 0.280mol
16.94444 16.1111 16.1111C 16.667C c
15.2778 13.0556 8.8889C c c
36.556C
20.445C
1.66664 -3.6114C c
-7.22