8. Thermochemistry
Constant-Pressure Calorimetry
Multiple Choice
Multiple ChoiceYou place 75.0 mL of 0.100 M NaOH in a calorimeter at 25.00 ºC and carefully add 55.0 mL of 0.200 M HNO3, also at 25.00 ºC. After stirring, the final temperature is 53.35 ºC. Calculate the enthalpy ∆Hrxn (in J/mol) for the formation of water. (Specific heat capacity, Cs, and density of the solution:4.184 J/g∙K and 1.00 g/mL).
A
-9.25x10-3 J/mol
B
-7.72x10-5 J/mol
C
-4.57x10-5 J/mol
D
-2.05x106 J/mol
E
-6.39x10-8 J/mol
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