Heat of Reaction The Heat of Reaction experiment will also be carried out using a temperature probe connected to a  computer. The data collection will be carried out using the calorimetry experiment in LoggerPro®. There is a tutorial on the use of........................................... LoggerPro The experiment will involve one of the following reactions.... ... HCl + NaOH -------> NaCl + H2O HOAc + NaOH -------> NaOAc + H2O Use this equation to determine the limiting reagent.

SOME CAUTIONS:
Make sure you use 6.00 M reagents, not 6 M reagents.

CALCULATIONS

MOLAR HEAT of REACTION is defined as...... kilojoules of energy absorbed when one mole of reactant reacts.
If energy is given off by the reaction, the temperature of the system rises. The reaction is
exothermic and the HEAT OF REACTION is negative(-)

The following Assumptions are made to simplify the calculations:

• Calorimeter Constant is 0.00 j/ºC
• All liquids added act exactly like water.
• The density of the liquids is 1.00 g/mL

EQUATIONS

(Volume in mL)(Molarity) = millimoles

VolumeHCl + VolumeNaOH+ Volumewater = Volumeliquids

Temperaturefinal-Temperatureinitial = Temp. Changeliquids

(Massliquids)(-Temp. Changeliquids)(4.18 j/gºC) = Energy Change

Energy Change/[(1000 j/Kj)(Moles of Limiting Reagent)] = DH Reaction

 Always make the following checks of your calculations.....
 If the temperature went up... Heat of Reaction is negative (-) If the temperature went down... Heat of Reaction is positive (+)