Question

The first law of thermodynamics is concerned with the conservation of (A) momentum (B) energy (C) mass (D) temperature

Short answer

The correct answer is (B) energy, as the first law of thermodynamics is concerned with the conservation of energy and states that energy cannot be created or destroyed, only converted from one form to another.

Step-by-step solution

Choose the correct answer based on the conservation concept

Comparing all the given options, we can see that: (A) momentum: This is not related to the conservation of energy. (B) energy: This is the correct answer, as the first law is about the conservation of energy. (C) mass: This is not applicable as the conservation of mass is not the focus of the first law of thermodynamics. (D) temperature: This is also incorrect as the first law of thermodynamics is not about the conservation of temperature. So, based on the given options, we find that the correct answer is (B) energy, which represents the conservation concept in the first law of thermodynamics.