# Two absolute scal

Given,

Triple point of water in absolute scale A, TA = 200A

Triple point of water in absolute scale B, TB = 350B

We know that the triple point of water in Kelvin scale (TK) is 273.15K.

So, 200A = 273.15

A = 273.15/200 …………(1)

Also, 350B = 273.15

B = 273.15/350 …………(2)

Dividing equation (1) by (2),we get

A/B = (273.15/200)/(273.15/350)

A/B = 350/200

A/B = 7/4

4A = 7B

Hence, A and B are related by the relation 4A = 7B.

NOTE: The triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.

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