Question

A 1-kg metal sample is heated to 90

oC and then dropped into an insulated

container containing 200mL of water at 25

oC. When thermal equilibrium is reached, the

temperature of water rose to 40

oC.

1. What is the final temperature of the metal sample ?

2. What happened after the metal sample is dropped into the beaker?

3. Calculate the Q of the metal sample.

4. Calculate the specific heat capacity of the metal sample.

Answer 1

1) The final temperature of the metal sample is 40°C as well

2) It started transferring heat to water

3) $Q=c_wm_w\Delta t_w=12600\text J.$

4) $c=Q/(m\Delta t_s)=252\text{ J/(kg K)}.$