Statement about entropy and energy is true? *When ice freezes, it gives off energy and entropy increases *When ice freezes, it gives off energy and entropy decreases *When ice freezes, it absorbs energy and entropy increases *When ice freezes, it absorbs energy and entropy decreases

Question

aaronq · Answer

do you mean water freezes? because ice can't freeze..

anonymous · Answer

@aaronq  It says ice, but lets replace it with water?

aaronq · Answer

okay, so break it into 2 separate parts:

Order: is ice more or less ordered than water?

Heat transfer: is water freezing an exo- or endothermic process?

anonymous · Answer

More order? and .... an endothermic process? @aaronq

aaronq · Answer

so more order means that entropy decreases, and endothermic means that the system is absorbing energy.

anonymous · Answer

So the last one is correct?

aaronq · Answer

indeed

anonymous · Answer

Thanks so much!

aaronq · Answer

no problem, anytime !

vincent-lyon.fr · Answer

Careful!

In order to fill the blank in: "When water freezes, it ........ energy", 
change the sentence to its opposite: "When ice melts, it.......... energy" and think why you add ice cubes to your drinks in summer.

aaronq · Answer

thanks for the correction, it is indeed NOT absorbing heat !

aaronq · Answer

@J.Velasquez it's the second option

anonymous · Answer

Okay, thanks both of you! (: