From new thermodynamics to mechanics

The laws of classical and quantum mechanics are rebuilt in the frame of new thermodynamics. Heat is the sum of kinetic energy, system work, and system potential of gas, while force is the linear gradients of heat variation. Exporters and importers of force are evident in terms of exotherm and endotherm. Temperature and volume gradients create asymmetric forces driving rotation and spin (self-rotation). It verifies that force transfer doesn’t need a medium. As an outstanding achievement, a succinct and general equation is derived to predict the equilibrium distance of molecular interaction: L_e=∛((3π^(α-1) m_A g)/(4N_A kT)), without using any assumption, such as van der Waals force and dispersion force. In addition, the origins and attributes of repulsion and attraction are disclosed. Predicting results is applausive. For example, at 298 K, Le for N2, O2, and CH4 are 3.11, 3.11, and 3.68 Å, comparable to the data adopted in MD simulations of the literature. Furthermore, electrons are regarded as electro-neutral particles to build the atom structure. It is consistent with the quantum predictions. The first ionization energies of elements reported in the references are found to be close to the kinetic energies calculated in this paper.