Question

state the first law of thermodynamics and express it in its mathematics form mention it any two limitation​

Answer 1

:It says the energy you provide to any system will be used in two ways: 1)change of internal energy, 2) work done by the system. ... It says how energy (heat) is transform into different form. The limitation of the first law of thermodynamics is, it does not say anything about the direction of the flow of heat.