Energy

• Plan an investigation 


  Start by listing variables

  -Independent: I will change…

  -Control: I will control

  -Dependent: I will measure

  Simple method….

  -Repeat with same mass and make an average.

  -Change for other values of the independent variable and repeat and make an average.
• Practical : thermometer in solution

  How to make it more accurate?

  Put a lid on and insulate cup to keep heat in and take heat in
• Bond breaking making calculation

  R->P

  why exo?

  -Energy requires to break bonds is less than…

  -…Energy released when bonds are made.
• Exothermic


  -Chemical reaction

  -Which release energy from the chemicals into the surroundings
• Endothermic 


  When energy is taken from the surroundings