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**Temperature Scale :**

where R = Temp, on unknown scale.

**Boyle’s law and measurement of pressure :**

At constant temperature,

P_{1}V_{1} = P_{2}V_{2}

**Charles law :**

At constant pressure, V α T or

**Gay-lussac’s law :**

At constant volume, P α T

**Ideal gas Equation :**

PV = nRT

**Daltons law of partial pressure :**

Total pressure = P_{1} + P_{2} + P_{3} + ....

Partial pressure = mole fraction X Total pressure.

**Amagat’s law of partial volume :**

V = V_{1} + V_{2} + V_{3} + ....

**Average molecular mass of gaseous mixture :**

**Graham’s Law:**

Rate of diffusion d = density of gas

**Kinetic Theory of Gases :**

Kinetic equation of gases

Average K.E. for one mole =

- Root mean suqare speed

molar mass must be in kg/mole. - Average speed
- U
_{av}= U_{1}+ U_{2}+ U_{3}+ .... U_{N}

K is Boltzmman constant - Most probable speed
**Vander wall’s equation :** **Critical constants:**

V_{c}= 3b,

**Vander wall equation in virial form :**

**Reduced Equation of state :**

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