The following data was collected after running a calorimetric experiment using t

ID: 498554 • Letter: T

Question

The following data was collected after running a calorimetric experiment using three salts.

Table 1: Hsol Values of Salts Salt Hsol (kJ/mol) LiI 63.60 LiNO3 2.51 LiF 4.73

The data collected for each experiment is as follows.

Experiment 1: 2.33 g of unknown salt added to 150. mL of water resulted in a T value of 1.8°C.

Experiment 2: 2.33 g of unknown salt added to 150. mL of water resulted in a T value of 0.7°C.

Experiment 3: 2.33 g of unknown salt added to 150. mL of water resulted in a T value of 0.1°C.

Calculate the value of q for each of the experiments. (Assume that the heat capacity of water is 4.1801 J/g·°C.)

q= m × C × T

Where m is mass of water

C is heat capacity of water

T = temperature difference , T2 -T1

Experiment 1: q= 150g × 4.18 (J/g °C) × (-1.8°C)

= -1128.6J

Experiment 2 : q = 150g × 4.18 (J/g°C) × (0.7°C)

= 438.9 J

Experiment 3: q= 150g × 4.18 (J/g°C) ×(-0.1°C)

= -62.7J

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