Day: December 8, 2016

Internal energy

Internal energy

Internal energy

12/08/16

“How can we quantify the energy of internal molecules in a system?”

 

There seems to be a problem. Scientists and engineers often need to analyze the energies associated with objects. However, the atoms of all material are not contiguous with one another but are moving in many directions, each with their own potential and kinetic energy. So how can we quantify such system? Thankfully, after many decades of long research, a most useful concept known as internal energy has been developed. The internal energy of a system is defined by the summation all of the energies arising from the microscopic components of a system, which is often summarized symbolically by the equation U_internal = U_potential+U_kinetic, with U standing for energy