With respect to the first law of thermodynamics, which of the following statements is the most relevant?

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RRB Paper · Accepted Answer

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 states that the total energy in an isolated system is constant. An isolated system does not exchange particles and energy with the surrounding space. In an isolated system, energy can be converted from one form to another but it can neither be created nor destroyed.

With respect to the first law of thermodynamics, which of the following statements is the most relevant?

Energy can be created or destroyed depending on the source of input

Energy is always conserved

A process that involves transfer of heat energy is irreversible

There is a natural tendency for any system to degenerate into a disordered state

The correct answer is `No. 2: Energy is always conserved`

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With respect to the first law of thermodynamics, which of the following statements is the most relevant?

Energy can be created or destroyed depending on the source of input

Energy is always conserved

A process that involves transfer of heat energy is irreversible

There is a natural tendency for any system to degenerate into a disordered state

The correct answer is No. 2: Energy is always conserved

The correct answer is `No. 2: Energy is always conserved`