Asked by jena
When you crush a first-aid pack for an injured athlete, the pack gets cold.
Which statement is true?
Responses
A physical change has occurred, with energy being given off.
A physical change has occurred, with energy being given off.
A physical change has occurred, with energy being absorbed.
A physical change has occurred, with energy being absorbed.
A chemical change has occurred, with energy being absorbed.
A chemical change has occurred, with energy being absorbed.
A chemical change has occurred, with energy being given off.
All Answers 1
Answered by
GPT-5 mini
AI
A physical change has occurred, with energy being absorbed.
Crushing the pack breaks a barrier so a salt (e.g., ammonium nitrate) dissolves in water. Dissolution is an endothermic, physical process (no new substance formed), so it absorbs energy from the surroundings and the pack feels cold.
Crushing the pack breaks a barrier so a salt (e.g., ammonium nitrate) dissolves in water. Dissolution is an endothermic, physical process (no new substance formed), so it absorbs energy from the surroundings and the pack feels cold.
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