Practice: If 53.2kJ of heat are added to a 15.5g ice cube at - 5.00 oC, what will be the resulting state and temperature of the substance?
In Heating and Cooling curves we have the representation of the amount of heat absorbed or released during phase changes.
Heating & Cooling Curves
Concept #1: If a solid substance absorbs enough thermal energy it can undergo the phase changes of fusion and vaporization.
Concept #2: If a gaseous substance evolves enough thermal energy it can undergo the phase changes of condensation and freezing.
Example #1: How much energy (kJ) is required to convert a 76.4 g acetone (molar mass = 58.08 g/mol) as a liquid at -30 oC to a solid at -115.0 oC?
