Posted by **Sarah** on Sunday, July 4, 2010 at 8:57am.

A piece of aluminum (specific heat 910 J/kg C) of mass 200 g at 80C is dropped into a styrofoam cup filled with 100 mL of water at 20C. What the final temperatures of the water and the aluminum? Show calculations.

I have Q=m c T

but I got 80C which I know is wrong because I set up Q1=Q2 which gave me that, could you please help me set up this problem.

- physics -
**Damon**, Sunday, July 4, 2010 at 9:39am
Call final temp = T

Heat lost by Al = specific heat AL * mass of Al * (80-T)

Heat gained by water - specific heat of H2O * mass of H2O *(T-20)

Then

Heat lost by Al = Heat gained by H2O

- physics -
**Sarah**, Sunday, July 4, 2010 at 10:47am
right but I got 80 C both times, that cannot possibly be correct.

## Answer This Question

## Related Questions

- physics - Assume that 10 g of steam is added to 100 g of water initially at 19°C...
- physics - 1. Assume that 10 g of steam is added to 100 g of water initially at ...
- Physics - A 100-g aluminum calorimeter contains a mixture of 40 g of ice and 200...
- physics - a .250kg block of aluminum is heated to 100 C and then dropped into ....
- Chemistry - I have a few problems im having trouble with, any help..? 1. If a ...
- Physic - Assume all temperatures to be exact. An aluminum spoon at 84 degree C ...
- Physics - An aluminum spoon at 84 C is placed in a Styrofoam cup containing 0....
- Physics - An alloy of mass 225g is heated to 550C. It is quickly placed in 450g ...
- Physics - If 400 gm of aluminum are put into 200 gm of water at 20 C in 110 gr. ...
- Chemistry - A 54.7-g sample of aluminum at 95.0°C is dropped into 35.0 g of ...

More Related Questions