A 50 gram piece of ice at -20 C is dropped into an insulated container holding 250 grams of water at 25 C. What is the final temperature of the contents of the container?(adsbygoogle = window.adsbygoogle || []).push({});

I can't seem to get this problem. I was doing the following:

Lf water = 333 J/g

c water = 4186 J/kg*C

c ice at -10 C = 2220 J/kg C

.05 kg*2220 J/kg*C * (-10 + 20) (should I use this step?) + .05 kg*4186 J/kg*C * Tf + 10) + 50 g*333 J/g = - .25 kg*4186 J/kg C * (Tf - 25)

And I keep getting it wrong. Any suggestions? Thanks a ton

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# What is the final temperature of the contents of the container?

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