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1. State the Avogadro law. 2. Give the mathematical expression of this law. 3. What is the value of molar volume of an ideal gas at 273.15 K and 1 bar? 4. Show that, at constant temperature and pressure, the density of an ideal gas is proportional to its molar volume. |
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Answer» 1. It states that equal volumes of all gases under the same conditions of temperature and pressure contain equal number of molecules. 2. v ∝ n (at constant P and T) ⇒ V = k × n where k is a proportionality constant.. 3. 22.71098 L 4. According to Avogadro law, for n moles of an ideal gas, V = k × n But n = \(\frac{m}{M}\) where m is the mass of the gas and M is its molar mass. Thus, V = k × \(\frac{m}{M}\) On rearranging the above equation, M = k × \(\frac{m}{V}\) = k × d ⇒ M ∝ d |
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