The graph has been representing curve A of cold gas, and curve C at hot gas. Thus, option B is correct.
The graph has been the representation of the number of particles and energy. The curve C has been constituted of the highest energy, while the curve A has been constituted of the lowest energy.
In curve C, the particles are excited, resulting in all the particles to have movement and correspond to high energy. This has been evident in hot gas, has all the molecules are possessing energy.
Thus, C has been representing the hot gas.
The curve A has been comprising the molecules with the least energy. The cold gas has lesser particles comprising high energy.
Thus, the graph has been representing curve A of cold gas, and curve C at hot gas. Thus, option B is correct.
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