Calculate the calories needed to freeze 35 g of water and indicate whether heat is absorbed or released.

Question

anonymous · Answer

oh thats a chemistry question thou but anyways,

anonymous · Answer

try the formula Q = mL

anonymous · Answer

@jigglypuff314 help here

jigglypuff314 · Answer

erm heat change in freezing of water=-79.72 cal/g freeze 35 g of water=(35)(-79.72)=-2790.2 calories (heat absorbed) http://www.transtutors.com/questions/tts-heat-115489.htm

anonymous · Answer

Q=mLf bot the latent heat of fusion of water is 79.8 cal/g.
=> Q=79.8 cal/g*35g=2793 cal. as the change of state is from liquid to solid heat is released!!!

jigglypuff314 · Answer

yeah logic mistake on my part, sorry.
think like when you're cooling something (turning water into ice)
you should be taking heat away from it to do that
so heat should be released :)

anonymous · Answer

THANK YOU

jigglypuff314 · Answer

glad we could help :)

Best of Luck for your journey on OpenStudy.

anonymous · Answer

Jiggly also give her link to chemistry group