Question

The 1st Law of Thermodynamics is a statement about (A) Temperatures scales (B) Whether a process can proceed in a specific manner (C) The efficiency of a system (D) Energy conservation (E) None of the above

Answer 1

Answer:

Energy conservation.

Explanation:

The 1st Law of Thermodynamics is a statement about energy conservation. It states that $\Delta U=Q-W$, which means that if we substract the work W done by the system to the heat Q given to the system we get the change in the internal energy $\Delta U$, so any excess in energy given to the system appears as internal energy, stating that energy is conserved.