Part 1: Enthalpy of baking soda and vinegar reaction
Table 8.1
Volume of vinegar
Mass of sodium bicarbonate
Initial temperature of vinegar
Final temperature of vinegar
Change in temperature °C (AT)
25 mL
1g
17 °C
14 °C
1. Calculate the approximate enthalpy of the reaction in joules. Estimate that 1.0 mL of
vinegar has the same thermal mass as 1.0 mL of water. Ignore the thermal mass of the
sodium bicarbonate. Note: It takes about 4.2 joules (J) to change 1.0 gram (1.0 mL) of water 1.0 °C.
-315).
2. Is the reaction endothermic or exothermic?
the valve is negative So, it means that heat is
releasing, the reaction is exothermic.
3. What steps could be taken to improve the accuracy of your results?
The accuracy could be improved with a better calorimeter, better thermometer,
and a larger sample.