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Molar Volume
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Volume The amount of space that an object takes up
A solid’s or liquid’s volume is determined by the size and spacing of its particles At a higher temperature, particles are moving faster, hitting each other and bouncing further apart Volume is greater at higher temperatures
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Molar Volume Mass of a mole of substance is called:
Molar Mass – Dynamic Quantity Volume of a mole of substance is called: Molar Volume – Static Quantity
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Molar Gas Volume Avogadro’s Hypothesis
Equal volumes of different gases, measured the same temperature and pressure, have equal numbers of particles. Standard Temperature & Pressure (STP) 0oC 101.3 kPa = 1 atm
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Molar Gas Volume The molar volume of any gas at STP is 22.4L.
Conversion Factor 1 mol = 22.4 STP
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What is the volume of 1.3 mol of NO2 at STP?
1.3 mol NO2 x _22.4 L___ 1 mol NO2 = 29 L
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What volume of oxygen gas at STP contains 2.33 mol of O2?
2.33 mol O2 x _22.4 L___ 1 mol O2 = 52.2 L
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Natural gas is used to heat many homes
Natural gas is used to heat many homes. It consists primarily of methane, CH4. What is the mass of 8.9 L of CH4 at STP? Steps: L CH4 → mol CH4 → mass CH4 8.9 L CH4 x 1 mol CH4 x g CH4 22.4 L CH mol CH4 = 6.4 g
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