When you crush a first-aid pack for an injured athlete and the pack gets cold, which of the following is true?

a. A physical change has occurred, with energy being absorbed.

b. A chemical change has occurred, with energy being given off.

c. A physical change has occurred, with energy being given off.

d. A chemical change has occurred, with energy being absorbed.

*** I believe it is a physical change, but idk if energy is being absorbed or given off. Please explain! Thank you :)

Question

When you crush a first-aid pack for an injured athlete and the pack gets cold, which of the following is true?

 a.      A physical change has occurred, with energy being absorbed.

 b.      A chemical change has occurred, with energy being given off.

  c.     A physical change has occurred, with energy being given off.

   d.    A chemical change has occurred, with energy being absorbed.

*** I believe it is a physical change, but idk if energy is being absorbed or given off. Please explain! Thank you :)

hba · Answer

A chemical change has occurred, with energy being absorbed.

anonymous · Answer

how is it a chemical change?? i thought it was physical tho...

anonymous · Answer

is it cuz it changed chemically??

jim_thompson5910 · Answer

agreed with hba (even though I'm not a chem expert)

it sounds like when you crush the package, the two separated contents (whatever they are) mix and undergo a chemical reaction, which absorb the energy (making it seem colder)

anonymous · Answer

Cool cool! Thanks for all the help :)