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What is gram molecular value? Explain. |
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Answer» The volume occupied by one gram mole of a substance in the gaseous or is the vapour state at STP is called the gram molecular volume. The gram molecular volume of all the substance is found to be 22.4 dm3 or 22400 cm3. The mass in gram of 22.4 dm3 of a gas or vapour at STP is equal to its gram molecular weight. 1 g molecule of chlorine or 1 gram molecule of carbon di-oxide or 1 gram of any other substance in the gaseous state occupies a volume of 22400 cm3 (22.4 dm3). 1 g molecule weight of hydrogen = 2.016 g, 2.016 g of hydrogen occupies 22.4 dm3 of volume at STP. But 1 g equivalent weight of hydrogen is 1.008 g occupies 11.2 dm3 of volume at STP or mass of 11200 cm3 of hydrogen = its equivalent weight. |
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