Thermochemistry & Thermodynamics
6 terms
Calorific Value
Thermochemistry & Thermodynamics
kJ/g
The heat released by the complete combustion of unit mass of a fuel.
CV = ΔH_c / molar mass
Calorimetry
Thermochemistry & Thermodynamics
J
The experimental measurement of heat exchanged during a physical or chemical change.
q = mcΔT
Carnot Cycle
Thermochemistry & Thermodynamics
Dimensionless
An idealised reversible cycle of two isothermal and two adiabatic steps that defines the maximum efficiency of a heat engine.
η = 1 − T_cold / T_hot
Closed System
Thermochemistry & Thermodynamics
Dimensionless
A system that can exchange energy but not matter with its surroundings.
Coupled Reactions
Thermochemistry & Thermodynamics
kJ/mol
Two reactions linked through a shared intermediate so that a favourable one drives an unfavourable one.
ΔG_total = ΔG₁ + ΔG₂ < 0
Cyclic Process
Thermochemistry & Thermodynamics
J
A process in which a system undergoes a series of changes and returns to its exact initial state.
ΔU = 0, q = −w