For three low-density gases A, B and C, pressure versus temperature (°C) graphs at constant volume meet the temperature axis at point K. The temperature at K is: Image
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Question

For three low-density gases A, B and C, pressure versus temperature (°C) graphs at constant volume meet the temperature axis at point K. The temperature at K is: Image

G1 Physics · Accepted Answer

At constant volume for an ideal gas: P = nRT/V If t is in °C: T = t + 273 So: P = (nR/V)(t + 273) At P = 0: t + 273 = 0 t = −273°C Hence option A.