Kinetics

• What is the definition of a catalyst?

  substance that increases rate of reaction without being used up & provides an alternative pathway that requires lower activation energy
• What is the definition of Activation Energy?

  minimum energy required to start a reaction
• Why do and how do chemical reactions occur?

  particles of substance collides
• What is this graph called?

  maxwell boltzmann distribution curve

  
• What is the y-axis of the Maxwell Boltzmann Distribution curve?

  number of molecules
• What is the x-axis of the Maxwell Boltzmann Distribution?

  energy
• What does the total area under the Maxwell Boltzmann curve represent?

  total number of molecules in a sample - must remain constant
• What are the factors that affect the rate of reaction?

  temperature & concentration & surface area & catalysts
• What does an increase of temperature do to the rate of reaction?

  thermal energy is converted to kinetic energy - substances move faster ; increased movement of molecules leads to increased frequency of successful collisions
• What does the second line on the Maxwell Boltzmann Distribution represent?

  increase of temperature

  
• What does an increase of concentration do to the rate of reaction?

  increase of molecules of substance occur in same volume and molecules become packed together ; collisions between molecules become more likely
• What does an increase of pressure do to the rate of reaction?

  molecules are packed together closer in a smaller volume