R-407C is an azeotropic blend.

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Multiple Choice

R-407C is an azeotropic blend.

Explanation:
R-407C is not an azeotropic blend. It’s a zeotropic (or near-azeotropic) refrigerant mixture composed of R-32, R-125, and R-134a. In an azeotrope, the vapor has the same composition as the liquid at boiling, so the mixture boils at a single, fixed temperature and behaves like a pure substance. R-407C has components with different boiling points, so during phase change the vapor and liquid compositions shift and a temperature glide occurs as it boils and condenses. This means it does not boil at a single temperature, and thus it does not form a true azeotrope.

R-407C is not an azeotropic blend. It’s a zeotropic (or near-azeotropic) refrigerant mixture composed of R-32, R-125, and R-134a. In an azeotrope, the vapor has the same composition as the liquid at boiling, so the mixture boils at a single, fixed temperature and behaves like a pure substance. R-407C has components with different boiling points, so during phase change the vapor and liquid compositions shift and a temperature glide occurs as it boils and condenses. This means it does not boil at a single temperature, and thus it does not form a true azeotrope.

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