Homework Help: Chem

Posted by Hannah on Thursday, March 3, 2011 at 5:25pm.

Can u guys check my answer??

Question: convert 24 grams of ice at -10 degrees Celsius to water at 45 degrees Celsius.

I got q= 13022 joules

Is that correct?

Chem - DrBob222, Thursday, March 3, 2011 at 5:46pm
I don't think so. Post your work and I'll look for the error.
Chem - Hannah, Thursday, March 3, 2011 at 5:57pm
Q=24.0g (2.03j/gc) (10c)
Q=334j/g(24g)
Q=24g(4.184j/gc)(45c)

Added them and got q= 13022j
Chem - DrBob222, Thursday, March 3, 2011 at 6:18pm
24.0(2.03)(10) = 487.2
4518.7
487.2 + 4518.7 = ??about 5,000+
Chem - Hannah, Thursday, March 3, 2011 at 7:54pm
But 334 x 24= 8016
Chem - Hannah, Thursday, March 3, 2011 at 7:56pm
Oh oops I see where u got the 4518.7 but don't u also have to add the middle equation??

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