Rate Processes

The decomposition of benzene diazonium chloride (C6H5N2Cl, molar mass = 141 g/mol) at 50 degrees Celsius follows the first order kinetics rate law with the reaction equation: C6H5N2Cl-->C6H5Cl + N2, and has a half-life of 10.8 minutes. Exactly one liter of a solution of 10.0 g/L of benzene diazonium chloride is reacted and the generated nitrogen gas is trapped over water at 22.0 degrees Celsius under a barometric pressure of 743 Torr. a) Calculate the volume of nitrogen gas that has been released by the reaction after 20.0 minutes b) Calculate the volume of nitrogen gas that the reaction will release when it is complete, i.e. after infinite time

Enthalpy

The bombardier beetle uses an explosive discharge as a defensive measure. The chemical reaction involved is the oxidation of hydroquinone by hydrogen peroxide to produce quinone and water. Please see the attached file for full problem description.

Calorimetry

In a coffee-cup calorimeter, 1.10 g of NH4NO3 is mixed with 76.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.93°C. Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.

Hess's Law

see attachment

soluability and Ksp

A saturated solution of silver chloride, AgCl contains 1.92 mg of AgCl per liter of solution. What is the value of the soluability product constant Ksp for silver chloride. I know that soluability for AgCl at 25 degrees celcius ksp = 1.8 x 10 -10, however I am not sure if I would even need to incorporate this into the equation, and this data was not a given with the original problem. At this point, i set the problem up like this: AgCl<> Ag Cl from this point I am not sure what direction to take.