This complete year 12 lesson on experimental determination of enthalpy changes covers part of OCR section 3.2.1 (Enthalpy changes). It includes the energetics topics: calorimetry, associated errors, and calculations involving q = mc∆T . It features a 36 slide interactive PowerPoint that illustrates the concepts in a lively, visual and systematic way and includes a starter, learning checks, clearly explained examples, including example calculations ,and a plenary quiz. A 12 page worksheet and answers to the exercises are provided.
This resource is part of a series covering the OCR AS Chemistry specification and relates to the following sections:
Module 3 – Periodic table and energy
Part 2 – Physical chemistry
3.2.1 – Enthalpy changes
Content covered:
• Energy exchange with the surroundings - heat loss in a chemical system = heat gain by surroundings
• Temperature scales
• Determining enthalpy changes using calorimetry
• Calculations involving q = mc∆T .
• Determining enthalpy changes in solution
• Determining enthalpy of combustion
• Errors associated with calorimetry experiments and how to minimise them
• Cooling curves and how to find the temperature rise
• Thermometric titration
Duration: 1 lesson
Please review!
Links
Previous topic: Topic 25 – Enthalpy changes (free resource)
https://www.tes.com/teaching-resource/enthalpy-changes-ocr-as-chemistry-12509439
Next topic: Topic 27 – Bond enthalpies
https://www.tes.com/teaching-resource/resource-12595300
Free resource - standard form, decimal places and significant figures
https://www.tes.com/teaching-resource/resource-12405507
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