February 20, 2017

Homework Help: AP Chem

Posted by Rachel on Tuesday, March 22, 2011 at 11:27am.

A student performs an experiment to determine the enthalpy of neutralization of hydrochloric acid and sodium hydroxide. The student combines 25 mL of equimolar solutions of acid and base, both having an initial temperature of 22.5 C, in an open polystyrene calorimeter. Each solution has a density of 1 g/mL and a specific heat of 4.18 J/g C. The student collects data until a maximum temperature of 26.4 C is reached. What assumption is the student allowed to make and explain how the student knows that data collection is complete.

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