Question

Read the passage about a chemical reaction that absorbs or releases thermal energy. Then, follow the instructions below.
An antacid is a medicine used to calm an upset stomach. Antacid tablets contain a mixture of sodium bicarbonate
(NaHCO3)
and citric acid
(C6H8O7)
. When a tablet is dissolved in water, these substances react to form sodium citrate
(Na3C6H5O7)
, water
(H2O)
, and carbon dioxide
(CO2)
in the solution. During the reaction, thermal energy is absorbed from the surroundings. When a person swallows this antacid solution, the sodium citrate can help relieve stomach pain.
Complete the statement.


During this chemical reaction, the air around the reaction becomes

Warmer

Colder

anonymous
asked anonymously

Answer 1

During this chemical reaction, the air around the reaction becomes **colder**. This is because the reaction absorbs thermal energy from the surroundings, resulting in a decrease in temperature.