"The Total Amount of Mass-Energy in the Universe is Constant

Question

"The total amount of mass-energy in the universe is constant," is a statement of
A)the first law of thermodynamics.
B)the second law of thermodynamics.
C)thermodynamic spontaneity.
D)entropy.
E)enthalpy.

Accepted Answer

The first law of thermodynamics, also known as the law of conservation of energy, states that energy cannot be created or destroyed in an isolated system, which aligns with the statement that the total amount of mass-energy in the universe is constant.