Phase Change

• Phase change of matter is a change that affects the form but not the chemical composition
• Causes of phase change:

  • Temperature
  • Kinetic energy
  • Intermolecular spacing
• Melting is a process that turns solids into liquids. THIS IS DUE TO THE ABSORPTION OF HEAT OF MOLECULES THAT DISTURBS ATTRACTIVE FORCES OF MOLECULES. CAUSING THEIR MOLECULES TO HAVE GREATER INTERMOLECULAR SPACING.
• Freezing is a process that turns liquids to solids. The temperature affects the attraction of molecules, increasing intermolecular force, causing a more fixed position of molecules (releasing heat). Freezing occurs in cold temperatures
• Condensation is a process that involves turning gases to liquids. During condensation, heat is released
• Sublimation is a process that turns a solid directly into a gas without passing through the liquid state
• Deposition is a process that turns gas into a solid. IT HAPPEN WHEN THE TEMP IS EXTREMELY LOW.