required practical

• What is energy transfer?

  The process of moving energy from one system to another
• How can you measure the energy released by a chemical reaction?

  By measuring the temperature change in a solution
• What is the purpose of using a polystyrene cup in energy measurement?

  To minimize heat loss to the surroundings
• What is the biggest issue with energy measurements in reactions?

  Energy lost to the surroundings
• How can you reduce energy loss during a reaction measurement?

  By insulating the cup and placing a lid on it
• How can you investigate the effect of variables on energy transfer?

  • Measure temperature changes in reactions
  • Change one variable at a time
  • Record and analyze results
• What is the first step in testing acid concentration's effect on energy released in a neutralization reaction?

  Put 25cm³ of HCl and NaOH in separate beakers
• Why should both beakers be placed in a water bath set to 25 degrees?

  To ensure both solutions reach the same temperature
• What should you do after adding HCl to the polystyrene cup?

  Add NaOH to the cup with a lid
• How often should you take the temperature of the mixture during the experiment?

  Every 30 seconds
• What should you record after measuring the temperature of the mixture?

  The highest temperature reached
• What should you do to repeat the experiment with varying quantities of hydrochloric acid?

  Change the amount of HCl used