[klg90]

How much heat is released as the temperature of 25.2 grams of iron is decreased from 72.1C to 9.8C? The specific heat of iron is 0.444J/g(C).

[klg90]

I used the equation for specific heat but I think that answer is for the heat absorbed not released. I'm confused about how to get the heat released.

[Borek]

Please read forum rules.

q = m c deltaT

[klg90]

I used the equation for specific heat but I think that answer is for the heat absorbed not released. I'm confused about how to get the heat released.

[Borek]

Sorry, I must have opened the thread before you posted at 20:51:47 missed the post.

Doesn't matter if the heat is absorbed or released, it is the same formula - just opposite sign.

[klg90]

I stayed stuck after this step:

100g(T_F - 100C)=(200g)(T_f)-20C)

(T_f)=100g(T_f)

[Borek]

Where did you got 100g and 200g from? Where did you got 100 deg C and 20 deg C from?

I told you explicitly what formula to use.