temperature changes

• what are the safety precautions for the temperature change practical

  wear safety goggles
• what is the method to investigate the variables that affect temperature change in chemical reactions?

  1. measure acid into polystyrene cup
  2. place cup inside beaker to make it more stable
  3. measure and record temperature of acid
  4. measure x and add to cup
  5. put lid on cup quickly and stir solution
  6. when temperature stops changing, record it
  7. repeat steps with different masses of x, repeat each mass 3 times and calculate mean
  8. calculate change in temperature ? (or mean max temp)