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Coffee Cup Calorimetry Lab
AP Chemistry · Unit 6 Thermochemistry
Learning Objectives
Calculate q = mcΔT for calorimetry
Determine ΔH from temperature change data
Distinguish exothermic (ΔT>0) from endothermic (ΔT<0)
Apply constant-pressure calorimetry (qp = ΔH)
Key Equations
q = mcΔT
qrxn = −qsolution
ΔH = qrxn / n
c(H₂O) = 4.184 J/(g·°C)
Assumption: csolution ≈ cwater
Tags
calorimetryenthalpyq=mcΔTthermochemistry
Mass of solution (g) 100
Initial Temp Tᵢ (°C) 22.0
Final Temp Tf (°C) 35.5
Moles of solute (mol) 0.050
ΔT
13.5°C
qsoln
5648 J
qrxn
−5648 J
ΔH
−113 kJ/mol