a .500 g of solid KCl is dissolved in 50.0 g of water initially at 21.5 degrees celsius, causing the water's temperature to drop to 18.1 degree celsius. a)How much heat in Joules was lost by the water? b) How much heat would be lost by the water if 1 mole of KCl had dissolved? c) What is (Delta Heat reaction) in kL/mole for this process, which can be written as KCl (s) --> KCL (aq)?