Posted by **Justin** on Friday, October 28, 2011 at 2:36am.

as 390 g of hot milk cools in a mug, it transfers 30,000 J of heat to the environment. What is the temperature change of milk? The specific heat of milk is 3.9 J/g degree C.

- science -
**Jai**, Friday, October 28, 2011 at 3:39am
recall that heat absorbed released is given by

Q = mc*(T2 - T1)

where

m = mass (in g)

c = specific heat capacity (in J/g-k)

T = temperature (in C or K)

*note: Q is (+) when heat is absorbed and (-) when heat is released.

we're looking for (T2 - T1) here. substituting,

30000 = 390*3.9*(T2 - T1)

(T2-T1) = 19.72 K

hope this helps~ :)

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