PHASE CHANGE AND CALORIMERTY REVIEW
1.
A piece of stainless steel weighing 1.55 g absorbs 141 J of heat energy when its
temperature increases by 178oC. What is the specific heat of stainless steel?
[0.511 J/gC]
2.
The specific heat of olive oil is 2.0 J/g oC. When 435 J of heat is added to the olive
oil in a pan the temperature increases from 25oC to 110oC. What amount (mass) of
olive oil was placed into the saucepan? [2.6g]
3.
How many kilojoules (kJ) of heat are absorbed when 0.46 g of chloromethane
(C4H5Cl, boiling point 12.3oC) vaporizes at its boiling point? Chloromethane, ∆Hvap =
26.4 kJ/mol. [0.14KJ]
4.
How much energy in Calories (Cal) is needed to raise the temperature 49.32 g of
copper metal from 23.0oC to 137.0oC? [517 cal] CCu = 0.385 KJ/Kg oC
5.
What amount of energy is require to 40.0 grams of liquid water at room
temperature (23.0oC) and change it into 40.0 g of steam at 145.0oC?
[106.3 kJ]