Chapter 5 Thermodynamics

Hesss law

Hesss law

________ states that if a reaction occurs in a series of steps, then the enthalpy change for the overall reaction is simply the sum of the enthalpy changes of the individual steps.

Gibbs free energy

The ________ (G) is a thermodynamic function that combines the enthalpy,

DH

If ________ <0 the reaction is exothermic.

Entropy

________ (S) is related to the disorder of a system.

enthalpy change

The ________, △H, is equal to the heat gained or lost by the system under constant- pressure conditions.

Calorimetry

________ is the laboratory technique used to measure the heat released or absorbed during a chemical or physical change.