A 2.00-g sample of a salt is dissolved in 30.0 g of distilled water in a calorimeter.
Question:
A 2.00-g sample of a salt is dissolved in 30.0 g of distilled water in a calorimeter. The temperature of the solution rises from 20.5 ºC to an extrapolated final temperature of 31.7 ºC. Assume that the mass of the solution is the combined masses of the salt and the water and that the specific heat capacity of the solution (C) is 4.18 J/g.ºC. In this process, the solution represents the surroundings and the reaction represents the system.
Use the information and equation provided in the experiment handout to answer the following questions:
q surr =sol = m x C x (Tf – Ti) and q sys=rxn = - q surr=sol
a). Calculate the heat of of the solution (surroundings), q sur in Joules. Clearly show ALL your calculations.
b). Determine the heat of the reaction of dissolution (system), q sys=rxn in Joules. Clearly show your reasoning.
c). Calculate the heat of the reaction of dissolution of this salt (M.M. = 121 g/mol) in kJ/g then in kJ/mol.
Expert Answer:
