In a coffee cup calorimeter 38.2 mL of 0.100 M AgNO3 and 38.2 mL of 0.100 M HCl
ID: 619744 • Letter: I
Question
In a coffee cup calorimeter 38.2 mL of 0.100 M AgNO3 and 38.2 mL of 0.100 M HCl are mixed to yield the following reaction. Ag+(aq) + Cl ?(aq) ? AgCl(s) If the two solutions are initially at 22.60Explanation / Answer
Let UNITs guide you; always USE THEM in your calculation to prevent errors Firstly, the eqn: Ag+ + Cl- ----> AgCl_____dHrxn = ?? kJ/mole dHrxn/mole = - [4.18 J/gC * 100g * (23.39 - 22.60)C] / (0.0382 liters * 0.100 mole / liter = ?? J/mole dHrxn = - [?? J/mole] / 1000J/kJ = ?? kj/mole Plug and SOLVE Basic mathematics is a prerequisite to chemistry – I just try to help you with the methodology of solving the problem.