In a constant pressure calorimeter at standard conditions, 0.400 mol sodium metal is reacted with 432.0...
In a constant pressure calorimeter at standard conditions, 0.400 mol sodium metal is reacted with 432.0 mL of water as indicated in the following balanced thermochemical equation:
2 Na (s) + 2 H2O (l) → 2 NaOH (aq) + H2 (g)
Calculate BOTH ΔrH and ΔrU for this reaction (at standard conditions), assuming ideal gas behavior and the following:
-the dry calorimeter apparatus has a total heat capacity of 678 J / deg C
-the calorimeter, water and sodium metal all have an initial temperature of 25.20 deg C and a final temperature of 34.20 deg C
-the aqueous solution that results has a total volume of 401.0 mL and a density of 1.04 g / mL
-the aqueous solution has the same specific heat as pure water: 4.184 J g-1 K -1
-the calorimeter is perfectly insulated
hint: Na is the limiting reactant!
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In a constant pressure calorimeter at standard conditions, 0.400
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