You may need to use your periodic tables to answer the following questions.  All energy should be found in Joules.  Remember that q = mDTCp
 

1. A sample of water changes temperature from 80.0 °C to 20.0 °C.  Calculate DT.
   
2. What is the specific heat capacity of water, in J/gC°?
   
3. How much energy is required to raise 57.1 grams of water from a  temperature of 36.5 °C to 66.9 °C?
   
4. What mass of magnesium is present if 250 J raises the temperature from 25 °C to 27 °C?
   
5. What is the heat capacity of an unknown metal if 65.5 grams absorbs 1550 J and undergoes a temperature change of 62.0 C°?
   
6. A beaker contains 125.0 grams of water at 22.0 °C.  A small piece of metal with a mass of 38.2 grams is hanging in another beaker of boiling water, measured at 102 °C.  When the metal is removed and added to the cooler water, the final temperature is 23.3 °C.  What is the specific heat of the metal?
   
7. A 155 gram sample of aluminum at 87.4 °C is placed in a container with 112 grams of water at 46.8 °C.  What is the final temperature?

[Specific Heat lab][MHS Chem page]