__Question 11.2__:*T*

_{A}and

*T*

_{B}?

__Solution__:Triple point of water on absolute scale A,

*T*

_{1}= 200 A

*T*

_{2}= 350 B

Triple point of water on Kelvin scale,

*T*

_{K}= 273.15 K

The temperature 273.15 K on Kelvin scale is equivalent to 200 A on absolute scale A.

*T*

_{1}=

*T*

_{K}

200 A = 273.15 K

∴ A = 273.15 / 200

The temperature 273.15 K on Kelvin scale is equivalent to 350 B on absolute scale B.

*T*

_{2}=

*T*

_{K}

350 B = 273.15

∴ B = 273.15 / 350

*T*

_{A}is triple point of water on scale A.

*T*

_{B}is triple point of water on scale B.

∴ (273.15 / 200) X T

_{A}= (273.15 / 350) X T

_{B}

_{}

T

_{A}= (200/350) T

_{B}

Therefore, the ratio

*T*

_{A}:

*T*

_{B }is given as 4 : 7.

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