Question

1

50.0 grams of an unknown metal is heated to 100.0°C and then placed in a calorimeter with 250.0 mL of water. If the final temperature of the
metal is 29.1°C and the calorimeter absorbed 824 Joules of energy, what
is the specific heat of the unknown metal? *

Answer 1

If the calorimeter gained 824 Joules of energy, then the piece of metal lost 824 Joules of energy.
The change in energy is equal to the mass times the heat capacity of the object times the change in temperature (Kelvin or Celsius). So, the heat capacity is the change in energy divided by the mass and also divided by the change in temperature.
824/(50g*70.9)=0.232