Multiple Choice
10.618 g of an unknown salt is dissolved in a coffee cup calorimeter that contains 50.0 mL of water. The measured temperature decreased from 23.8 °C to 22.7 °C. Identify the unknown salt. The specific heat of water is 4.184 J g-1 °C-1, and assume the density of the solution is 1.00 g mL-1.
A) NaF, ΔrH = 0.91 kJ mol-1
B) NaBr, ΔrH = -0.60 kJ mol-1
C) NaNO3, ΔrH = 20.50 kJ mol-1
D) LiNO3, ΔrH = -2.51 kJ mol-1
E) LiBr∙2H2O, ΔrH = -23.26 kJ mol-1
Correct Answer:
Verified
Correct Answer:
Verified
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