Moles and gas volumes

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  • Created by: racheon
  • Created on: 22-02-14 19:09
Define molar volume.
The volume per mole of a gas. The units of it are dm^3 mol^-1. At room temperature and pressure it's approximately 24 dm^3 mol^-1.
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What do equal volumes of gases at the same temperature and pressure contain?
Equal numbers of molecules, it doesn't matter which type of gas is being measured.
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By measuring the volume of any gas what are you indirectly counting?
The number of molecules.
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At room temperature and pressure how much does 1 mole of gas molecules occupy?
24 dm^3 or 24 dm^3 mol-1 volume.
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At room temperature and pressure what is 1 mole of H2, O2 and CO2 molar volume?
24 dm^3 mol^-1.
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What does 1 mol of H2 weigh?
2g.
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What does 1 mole of O2 weigh?
32g.
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What does 1 mole of CO2 weigh?
44g.
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If volume is in dm^3 how do you work out how many moles there are?
n=V/24.
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If volume is in cm^3 how do you work out how many moles there are?
n=V/24,000.
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What amount, in mol, of gas molecules is in 72cm^3 of any gas at room temperature and pressure?
n=V/24,000=72/24,000=0.003 mol.
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What is the volume, in cm^3, of 2.13x10^-3 mole of a gas at room temperature and pressure.
n=V/24,000. Hence, V=nx24,000=2.13x10^-3x24,000=51.12cm^3.
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Other cards in this set

Card 2

Front

What do equal volumes of gases at the same temperature and pressure contain?

Back

Equal numbers of molecules, it doesn't matter which type of gas is being measured.

Card 3

Front

By measuring the volume of any gas what are you indirectly counting?

Back

Preview of the front of card 3

Card 4

Front

At room temperature and pressure how much does 1 mole of gas molecules occupy?

Back

Preview of the front of card 4

Card 5

Front

At room temperature and pressure what is 1 mole of H2, O2 and CO2 molar volume?

Back

Preview of the front of card 5
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