Point 15 of 19 — Chapter 6: Gas LawsQuestion bank: 0 questions (0 with pictures)
15 6.2 Remarks
Redrawn against the absolute temperature T (kelvin), the V–T and P–T graphs are straight lines through the origin: V = 0 and P = 0 at 0 K.
In practice, a real gas does not reach these values: on strong cooling it liquefies (and may solidify) and no longer obeys the gas laws. An ideal gas is defined as a gas whose volume (at constant pressure) or pressure (at constant volume) would become zero at absolute zero, so that it obeys the gas laws at all temperatures.
The temperature on the Kelvin scale is always positive; Celsius temperature can be positive or negative.
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