Absolute zero — lesson. Science State Board, Class 9.

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The temperature at which the pressure and volume of a gas theoretically reach zero is called absolute zero.

Variation of pressure with temperature

At a temperature of

$–273.15$

$°C$ , the pressure extrapolates to zero for all gases. It is called n as absolute zero or

$0$

$K$ . Some baseline temperatures in the three temperature scales are shown below.

We can convert the values from one unit to another unit by using the formula,

a) Convert

$30$

$°C$ to

$Kelvin$

Solution:

$\begin{array}{l} T_{K} = T_{° C} + 273.15 \\ T_{K} = 30 + 273.15 \\ T_{K} = 303.15 K \end{array}$

b) Convert

$240$

$K$ to

$°C$

$\begin{array}{l} T_{° C} = T_{° K} - 273.15 \\ T_{K} = 240 - 273.15 \\ T_{K} = - 33.15 K \end{array}$

Did you find an error?

8. Absolute zero