Chapter 5 - Chemistry Notes II

Chapter 5 - Chemistry Notes II - -Then the rest can be...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Gas -Characterized by Pressure (P), Temperature (T(K), Volume and number of moles (M) -Combined gas Law P 1 V 1 /N 1 T 1 = P 2 V 2 /n 2 T 2 T must be in Kelvin (K = ºC + 273) -Ideal gas equation: PV = nRT R = 0.08206 L Atm / mol K Application: Molar mass determination Density -Reaction Stoichiometry: An airbag inflates: 2NaNs (s) 2Na (s) + 3 N 2 (g) ? g of NaN3 must be used to inflate the airbag to 26L Atm pressure of 1.15atm at 25ºC. (Combined) An inflated balloon has a volume of 0.5L at sea level (1 Atm) and is allowed to ascend in altitude until the pressure is 0.45 Atm. During ascent, the temperature of the gas falls from 22ºC to -21ºC. Calculate the volume of the ballon at its final altitude Ideal Gas:? Volume occupied by 16.0 g of ethane at 720 Torr and18ºC? Molar Mass:? Molar mass of a gas at 100ºC if it occupies 185ml with a pressure of 755 torr and its mass is 0.523g.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: -Then the rest can be derived from it-If n, T stay constant it will cancel out P 1 V 1 = P 2 V 2 (Boyles Law)-(T 1 = V 2 /T 2 Charles Law-P 1 T = cte V 1 /n 1 = V 2 n 2 Avogadros Law-Combined Gas Law E.G. Set problem as Initial Final P 1 = 1 Atm P2= 0.45Atm V 1 = 0.5L V2=? T 1 = 22C + 273 T2=-21C + 273 N 1 = N2= *Usually this is constant T2/P2 P1V1/T1 = P2V2/T2 (T2/P2) V2 = v1 (P1.P2) (T2/T1) = 0.5L (1atm/0.45atm) ( 252K/295K) Ideal Gas Equation: P V = n R T Atm L mol .08206 ( [L(Atm)]/mol(k)]) K Lets link molar Mass, density to PV = nRT if d = m/v then = m/d d P (m/d ) = n R T x d d = mP/nRT D=MP/RT M is molar mass, g/mol ? molar mass to PV = n R T (g/mol)nM = m/n x n PV m/M RT n = m/M M = mRT/PV Stoichiometry involving gas E.G. Airbag Rx Mass(g)...
View Full Document

Page1 / 2

Chapter 5 - Chemistry Notes II - -Then the rest can be...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online