Insoluble PbBr 2 (s) precipitates when solutions of Pb(NO 3 ) 2 (aq) and NaBr(aq) are mixed To measure the enthalpy change, 200 mL of 0 75 M Pb(NO 3 ) 2 (aq) and 200 mL of 1 5 M NaBr(aq) are mixed in a coffee cup calorimeter The temperature of the mixture rises by 2 44C Calculate the enthalpy chang...

To calculate the enthalpy change for the precipitation of PbBr2s we can use the heat transfer equati ...

Insoluble PbBr 2 (s) precipitates when solutions of Pb(NO 3 ) 2 (aq) and NaBr(aq) are mixed.

Question:

Insoluble PbBr₂(s) precipitates when solutions of Pb(NO₃)₂(aq) and NaBr(aq) are mixed. Pb(NO3)2(aq) + 2 NaBr(aq) PbBr(s) + 2 NaNO3(aq) A,H = ?

To measure the enthalpy change, 200. mL of 0.75 M Pb(NO₃)₂(aq) and 200. mL of 1.5 M NaBr(aq) are mixed in a coffee-cup calorimeter. The temperature of the mixture rises by 2.44°C. Calculate the enthalpy change for the precipitation of PbBr₂(s), in kJ/mol. (Assume the density of the solution is 1.0 g/mL, and its specific heat capacity is 4.2 J/g ∙ K.)

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