Posted by
**Tia** on
.

In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an insulated container of negligible mass.

What was the final temperature of the coins? [One-cent coins are made of a metal alloy - mostly zinc - with a specific heat capacity of 390 J/(kg*K).]

I know that:

Mass,coins=.615 kg

Mass,water=.244 kg

c=390 J/(kg*K)

Ti,water=20 C

I'm just not quite sure what equation to put them in...