Mention the equation showing the relation between free energy and change in pressure of an ideal gas.
Answers
The First Law of thermodynamics deals with the consequences of energy conservation.
Quantities considered are heat, work, energy and enthalpy.
The First Law is exact, and leads to equations describing energy flow.
In this part of the lecture we will focus on analyzing the nature of spontaneous processes in nature.
This leads to the formulation of the Second Law of thermodynamics, and to the introduction of new quantities: entropy and free energy.
As all scientific laws, the Second Law is based on observation of nature. Interestingly, the Second Law is not exact, it is a statistical law which works "practically always", and leads to inequalities describing the direction of spontaneous change.
The combination of the First and Second Law places additional constraints on future events compared to application of one of the laws alone.