Question

On the way to get her materials, the student falls and hurts herself. She decides to modify her design to make a cooling pack instead. Which of the materials would she place in her plastic bag to make a cooling pack? Choose two of the 4 answers.
A.
Calcium chloride and water
B.
Vinegar and baking soda
C.
Citric acid solutions and baking soda
D.
Laundry detergent and water
E.
Steel wool and vinegar

Answer 1

To make a cooling pack, the student would want to create an endothermic reaction, which absorbs heat from the surroundings and produces a cooling effect. The suitable options from the provided materials would be:

A. Calcium chloride and water - This combination can produce a cooling effect as calcium chloride dissolves in water and absorbs heat.

C. Citric acid solutions and baking soda - This combination can create a reaction that absorbs heat, producing a cooling effect.

Therefore, the two options she should choose are **A** and **C**.