A 1000 ML Sample of 0 $D _ { \mathrm { r } }$

question 135

Multiple Choice

A 100.0 mL sample of 0.300 mol L^-1 NaOH is mixed with a 100.0 mL sample of 0.300 mol L^-1 HNO₃ in a coffee cup calorimeter.If both solutions were initially at 35.00 °C and the temperature of the resulting solution was recorded as 37.00 °C,determine the $D _ { \mathrm { r } }$ H° (in units of kJ $\mathrm { mol } ^ { - 1 }$ ) for the neutralization reaction between aqueous NaOH and HNO₃ .Assume 1) that no heat is lost to the calorimeter or the surroundings,and 2) that the density and the heat capacity of the resulting solution are the same as water.

• A)-55.7 kJ mol^-1
• B)-169 kJ mol^-1
• C)-16.7 kJ mol^-1
• D)-27.9 kJ mol^-1
• E)-34.4 kJ mol^-1

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