Question

which specific law states that: the total energy of a system plus its surroundings is conserved, which means that the universes total energy remains constant.
the first law of thermodynamics and conservation of energy
the first law of thermal energy
the law of conservation of matter
the law of conservation of energy

Explanation:

• The First Law of Thermodynamics is also known as the Law of Conservation of Energy. It states that energy cannot be created or destroyed, only converted from one form to another. So the total energy of a system plus its surroundings (the universe) is conserved.
• The "First Law of Thermal Energy" is not a standard or recognized law in thermodynamics.
• The Law of Conservation of Matter states that matter cannot be created or destroyed in a chemical reaction (in a closed system), which is about matter, not energy as in the question.

Answer:

The First Law of Thermodynamics and Conservation of Energy, The Law of Conservation of Energy