When a 130 G Sample of NaOH(s)dissolves in 400

question 100

Multiple Choice

When a 13.0 g sample of NaOH(s) dissolves in 400.0 mL of water to produce 413.0 g of solution in a constant pressure calorimeter,the temperature of the water and reaction vessel changes from 22.6°C to 30.6°C.Assume that the specific heat capacity of the solution is 4.2 J/(g . °C) ,and that the heat capacity of the reaction vessel is 1.00 J/°C.What is the molar enthalpy of solution of sodium hydroxide (40.00 g/mol) ?

• A)"-34 kJ/mol"
• B)"-54 kJ/mol"
• C)"-17 kJ/mol"
• D)"-43 kJ/mol"
• E)"-14 kJ/mol"

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