IGCSE›Oxford AQA IGCSE Chemistry›Mind mapsCalorimetryOxford AQA IGCSE Chemistry: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsWhat is it?Measures energy transferred in a reactionUses the temperature change of water or solutionBurning fuelsKnown mass of water in a containerRecord the starting temperatureBurn the fuel beneath the containerRecord the highest temperature reachedThe equationQ=mcΔTQ = mc\Delta TQ=mcΔTm in grams, c in J/g°CWater: c=4.2 J/g°Cc = 4.2\,\text{J/g°C}c=4.2J/g°C100 g, 20 °C rise → 8400 J1 kJ = 1000 JCalorimetrymeasuring energyJg°CIn solutionNeutralisation or solid + waterUse an insulated container, e.g. polystyrene cupm is the mass of the solutionErrorsSome energy is lost to surroundingsResults underestimate the true valueMetal conducts better than glassExam tipsShow Q = mcΔT working with unitsInsulation improves accuracy