Molar Volume

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

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

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

Molar Gas Volume The molar volume of any gas at STP is 22.4L. Conversion Factor 1 mol = 22.4 L @ STP

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

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

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 16.0 g CH4 22.4 L CH4 1 mol CH4 = 6.4 g