As the lab was taking place, is it possible that the atmospheric (air) pressure may have changed? If it did change, how could the results have been affected? What
other variables may not have been accounted for in this lab?
(Hint: Air pressure changes if a weather front is moving through the area, such as
might be the case when rainstorms occur.)

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.