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1) When a 0.800g of CaCl2 was dissolved in 9.85g of water in a microscale calorimeter, the temperature of the solution rose from 23.4 celcius to 35.8 celcius.
a. calculate the heat in joules released by the dissolving salt. Assume that the specific heat of the solution is the same as thar of pure water(4.184J/g- celcius) and that the calorimeter is perfect.
b. calculate the enthalpy of solution kJ/mol of CaCl2.
2) From the following enthalpies of reaction:
2H2(g)+O2(g)---2H2O(g) triangleH= -483.6kJ
3O2(g)------2O3(g) triagleH= +284.6kJ
Utilize Hess's law to calculatw the enthalpy change for the reaction:\
3H2(g)+O3(g)--------3H2O(g)
when 0.500 l of a 2.00 m solution of Pb(NO3)2 is mixed with an excess of 1.00m solution of Ki, how many grams lead (II) iodide are formed? ( molar mass: Pb(NO3)2= 331 g;KI 166g; PbI2 =467 g; KNO = 101 g
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