The factors that can determine the outcome of a "neutralization reaction" include: __________________________________________________________ 1) temperature;
2) concentration (of the solution);
3) type of acid used;
4) type of alkali used;
5) type of reaction; (e.g. whether the reaction is "endothermic" or "exothermic"); _____________________________________________________
The dry ice absorbs heat from the air in the flask and become CO2 gas directly. So the heat flow from air to dry ice. And the CO2 gas increase the amount of the air. Though the temperature decreases, the balloon still inflates.