- #1

pmalayavech

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## Homework Statement

Need a second person to help verify if answer is correct.

Copper with a mass of 300 g initially at 200 °C is added to water with an initial temperature of 10 °C and mass of 500 g. What is the final temperature of the system when they are in equilibrium?

ANSWER must be in JOULES

My variables

Cu specific heat: 385.112 J/kg C

Water specificheat: 4186 J

## Homework Equations

Mm Cm (Tm - Tf) = Mw Cw (Tf-Tw)

## The Attempt at a Solution

Mm Cm (Tm - Tf) = Mw Cw (Tf-Tw)

I convert g to kg for mass

500g to .500kg and 300g to .300kgnow plug equation and work the algebraic equation

(.300) (385.112)(200-tf) = (.500)(4186)(tf-10)

to

(23106.72-115.5336Tf)=(2093Tf-20930)

to

4036.72 = 2208.5336 Tf

to

19.93934799 = Tf

Tf= 19.9 J/kg C

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