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Ch.8 Gases, Liquids and SolidsWorksheetSee all chapters

# Heating and Cooling Curves

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Sections
Pressure Units
Kinetic Molecular Theory
The Ideal Gas Law
The Ideal Gas Law Derivations
The Ideal Gas Law Applications
Chemistry Gas Laws
Chemistry Gas Laws: Combined Gas Law
Standard Temperature and Pressure
Dalton's Law: Partial Pressure (Simplified)
Gas Stoichiometry
Intermolecular Forces (Simplified)
Intermolecular Forces and Physical Properties
Atomic, Ionic and Molecular Solids
Heating and Cooling Curves

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?

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?