1.36 moles of an unknown ionic compound is dissolved in 50.0…

1.36 moles of an unknown ionic compound is dissolved in 50.0 mL of water in a coffee cup calorimeter.  The water is initially at 5.13°C, and the final temperature of the water after the ionic compound has fully dissolved is 8.21°C.  Calculate DHsoln in kJ/mol of ionic compound.  The density of water is 0.997 g/mL.  Assume that the final solution is dilute enough to have the same density and specific heat capacity as pure water.

[EXTRA CREDIT] (3 pts possible, question will show as being…

[EXTRA CREDIT] (3 pts possible, question will show as being out of 0 pts) A hotpack is commonly a plastic bag filled with aqueous sodium acetate solution.  Upon shaking the bag, sodium acetate precipitates out of solution, releasing heat in the process to keep your hands warm.  If 3.15 grams of sodium acetate must precipitate out, in order for the 5.00 mL of water in the hotpack to rise in temperature from 25.0°C to 61.3°C, calculate the heat of crystallization of sodium acetate in kJ/mol. Assume the density of water is 0.997 g/mL, and that all heat transfer is between the sodium acetate and the water solvent.  Assume the solution is dilute such that it has the same specific heat capacity as water. Show all work, using dimensional analysis where appropriate, and highlight your answer in a readable background color.

75.0 grams of solid sodium hydroxide is dissolved in 1.000 L…

75.0 grams of solid sodium hydroxide is dissolved in 1.000 L of 20.0°C water in a coffee cup calorimeter.  If the final temperature of the water is 40.0°C, calculate DHsoln for NaOH, in kJ/mol NaOH. Show all work, and highlight your answer in a readable background color.  Assume that the solution is dilute such that it has the same density and specific heat capacity of pure water.