Posted by **Brenda** on Thursday, December 6, 2012 at 10:40am.

I am trying to calculate heat transfer between two objects. The units are as follows:

m1: 100 g

t1: 10 degrees C

spec heat 1: 1.00 cal/g degree C

m2: 200 g

t2: 90 degrees C

spec heat 2: 0.2 cal/gm degree C

I set Q1 = Q2

m1 x spec heat 1 x delta T1 = m2 x spec heat 2 x delta T2 and solved for T final where Tfinal 1 = Tfinal 2.

My numbers aren't working out.

- Physics - Heat Transfer -
**Brenda**, Thursday, December 6, 2012 at 10:49am
aaaaaaaaahhhh. got it. you have to add them and set them equal to zero.

- Physics - Heat Transfer -
**drwls**, Thursday, December 6, 2012 at 12:54pm
Yes, you add them. One term is positive and the other is negative. The sum is zero.

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