The triple point of water is the temperature at which all three phases of water can…

PHYSICS · Multi-part · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

The triple point of water is the temperature at which all three phases of water can exist simultaneously. This temperature is 0.01 ∘C0.01\,^{\circ}\text{C}. Sample A is 50 g50\,\text{g} of ice, sample B is 50 g50\,\text{g} of liquid water and sample C is 50 g50\,\text{g} of water vapour. All three samples are at the triple point. (a) Which sample has the most internal energy? Explain your answer. (b) Which sample has the least internal energy? Explain your answer.

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