AS Chemistry 9701 | Energetics: Experimental Enthalpy Change (Q=mcΔT) | MEGA Lecture

Recorded: Monday, 7 September 2026 at 6:40 PM PKT Source file: GMT20260907-134020_Recording_1600x800.mp4 Recorded AS-Level Chemistry (CAIE 9701) class with Sir Fahad at MEGA Lecture — calculating experimental enthalpy change with Q = mcΔT: - Q = mcΔT, with the mass and specific heat capacity of the solution approximated as those of water (1 g/cm³, 4.18 J/g/K) - Why the biggest source of error in a calorimetry experiment is heat loss to the surroundings, not measurement precision - Extrapolating the cooling curve back to the moment of mixing to correct for heat lost before the thermometer responds - Reducing heat loss with insulation — a lid and an insulating cup or jacket around the reaction vessel - Working through calorimetry worksheet questions to find enthalpy of combustion per mole from raw temperature and mass data Join our WhatsApp group for free resources & class updates: https://chat.whatsapp.com/DpOZZDdLYo0AEktHktE1ME Fahad H. Ahmad: +92 323 509 4443 Book a Free Trial Class: https://www.megalecture.com #ASChemistry #9701 #CAIE #Energetics #MEGALecture