The true statement is:
A. this chemical reaction is exothermic; it converts chemical energy to thermal energy which is released into the surroundings.
Read the passage about a chemical reaction that causes a change in temperature. Then, follow the instructions below.
Some people use disposable hand warmers to stay comfortable on cold days. A hand warmer is a small pouch that contains powdered iron
(Fe)
, as well as salt and water. When the hand warmer is removed from its packaging, oxygen gas
(O2)
drifts through small holes in the material of the pouch. In the presence of the salt and water, the oxygen quickly reacts with the iron powder to form ferric oxide
(Fe2O3)
. As the reaction occurs, the temperature of the pouch increases.
Select the true statement.
A.this chemical reaction is exothermic it converts chemical energy to thermal energy which is released into the surroundings
B. this chemical reaction is endorsement it absorbs thermal energy from the surroundings and converts that energy to chemical energy
1 answer