Enthalpy chnages1.1.3

• What is one subject that has past papers available from OCR?

  Psychology
• How do revision notes help students prepare for exams?

  They condense information for easier review
• What is the first exam year for Cambridge (CIE) Physics?

  2025
• Why is it important to use past papers in exam preparation?

  They help students practice exam techniques
• Which exam board offers GCSE English Language past papers?

  AQA
• What is the role of flashcards in studying for exams?

  They promote active engagement with material
• What is the last exam year for Edexcel International Physics?

  2025
• What is the significance of GCSE revision resources?

  They enhance understanding and retention of material
• What is one subject that has past papers available from AQA?

  Biology
• How do revision notes assist in studying for exams?

  They summarize key information for study
• What is the first exam year for Edexcel International Maths?

  2025
• Why are past papers useful for students?

  They help identify areas needing improvement
• Which exam board offers GCSE Art past papers?

  AQA
• What is the benefit of using flashcards for revision?

  They aid in memorization of key concepts
• What is the last exam year for Cambridge (CIE) Geography?

  2024
• What is one subject that has past papers available from Edexcel?

  Business
• How do revision notes assist students in their studies?

  They summarize key concepts for quick review
• What is the first exam year for Edexcel International Geography?

  2025
• Why is it important to practice with past papers?

  To familiarize with exam structure and timing
• Which exam board offers GCSE Music past papers?

  AQA
• What is the role of flashcards in exam preparation?

  They promote active engagement with material
• What is the last exam year for Edexcel International Music?

  2025
• What is the significance of GCSE revision resources?

  They enhance understanding and retention of material
• What is one subject that has past papers available from Cambridge (CIE)?

  Biology
• How do revision notes assist in studying for exams?

  They summarize key information for study
• What is the first exam year for Edexcel International Art?

  2025
• What is calorimetry used for in chemistry?

  To measure changes in enthalpy
• What can a calorimeter be made from?

  Polystyrene cup, vacuum flask, or metal can
• What is the specific heat capacity of water?

  1. 18 J g^-1 K^-1
• How is energy transferred as heat calculated in calorimetry?

  Using a specific formula for energy transfer
• What are the two types of calorimetry experiments?

  • Enthalpy changes of reactions in solution
  • Enthalpy changes of combustion
• What is the principle behind calorimetry experiments?

  Mix stoichiometric quantities of acid and alkali
• What is the first step in a neutralisation reaction experiment?

  Measure 25.0 cm³ of hydrochloric acid
• How often should temperature be recorded during the neutralisation experiment?

  Every half minute for 9.5 minutes
• What assumptions are made in the calorimetry experiment?

  Specific heat capacity equals water's, density equals water's
• What is a temperature correction graph used for?

  To determine maximum enthalpy change
• What should be done before adding reactants in a temperature correction graph?

  Take a steady temperature reading
• What happens if the initial temperatures of HCl and NaOH are different?

  Plot as different lines on the graph
• What is the purpose of stirring during the neutralisation experiment?

  To ensure uniform temperature throughout
• What is the density assumption made in calorimetry experiments?

  Density equals that of pure water