R1.1.3 - Enthalpy + heat transfers

standard enthalpy change

heat energy transferred in a reaction under standard conditions (kJmol^-1)

SATP

100kPa + 298K (25 °C)

standard enthalpy change of formation

enthalpy change when 1 mole of a compound is formed from its elements in their standard states

standard enthalpy change of combustion

enthalpy change when 1 mole of a substance is fully combusted under standard conditions

Q = mcΔT

thermal energy absorbed/released (Joules)

ΔH = Q/n

enthalpy change per mol (kJmol^-1)

calorimetry

technique to measure heat transfer during chemical processes

calorimeter

apparatus used to measure the heat transfer in a chemical process

heat loss can be accounted for by…

extrapolate graph, match up initial temp time and trendline for true max