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UnbelievableDreams
 one year ago
I need help with Chemistry
UnbelievableDreams
 one year ago
I need help with Chemistry

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Zale101
 one year ago
Best ResponseYou've already chosen the best response.3To figure out the total joules of energy from water to ice at a given temperature and mass, you do 2 calculations. The first calculation is \(\bf q=m~x~C~x~\Delta T\) and it determines the amount of heat removed from water from18.1 °C to 0 °C for \(\bf \Delta T\). m is mass, C is specific heat capacity. The second calculation is to use \(\bf q=m~x~H_f\ and it determines the change of state between solid to liquid. m is mass and Hf stands for the heat of fusion of water and It should be given, 335 J/g.

Zale101
 one year ago
Best ResponseYou've already chosen the best response.3the heat of fusion is negative 335 j/g because the liquid is freezing, going back. dw:1436123790819:dw

Zale101
 one year ago
Best ResponseYou've already chosen the best response.3Water freezes means heat is being released (negative) 335 J/g Ice melting means heat is being absorbed (positive) +335 J/g

UnbelievableDreams
 one year ago
Best ResponseYou've already chosen the best response.0167g x (4.184 J/g) x (018.1 C) = 12647 167 g x (335 C) = 55945 55945+ (12647) = 68592 J Is it correct?

UnbelievableDreams
 one year ago
Best ResponseYou've already chosen the best response.0It said it is incorrect. :/

vera_ewing
 one year ago
Best ResponseYou've already chosen the best response.0How do you know it was incorrect? Are you using the Apex Learning website?

UnbelievableDreams
 one year ago
Best ResponseYou've already chosen the best response.0Yes, I am using this website. I spend hours trying to solve it. Now, I have two chances. :/

UnbelievableDreams
 one year ago
Best ResponseYou've already chosen the best response.0I thought I was 167g, not 165g?

Zale101
 one year ago
Best ResponseYou've already chosen the best response.3q = 167g (4.184 J/g) (018.1 C) q=12647 < you got this incorrect and q=167 g x (335 C) q=55945 Total Joules=55945J +(12647J)=68592 J <this should be the answer
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