Question

Which among the following correctly explains the 1st law of Thermodynamics?

• A. Energy is not constant
• B. In an isolated system, natural processes are spontaneous when they lead to an increase in disorder, or entropy.
• C. Energy is conserved; it can be neither created nor destroyed.
• D. Energy is neither constant nor variable

Answer 1

The correct option is C Energy is conserved; it can be neither created nor destroyed.

The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic systems. The law of conservation of energy statesthat the total energy of an isolated system is constant; energy can be transformed from one form to another, but can be neither created nor destroyed.