CHEM 1465 HW 5

Gay-Lussac’s Law of combining volumes states that the volumes of gases involved in a chemical reaction are in the same ratio as the coefficients for these gases in teh balanced equation for the reaction provided that ____?

all volumes are measure at the same temperature and pressure

What volume of H₂ gas at 780 mm Hg and 23 °C is required to produce 10.6 L of NH3 gas at the same temperature and pressure?

N_2(g)+3H_2(g)—→ 2NH_3(g)

15.9 Lof H₂

Avogadro’s Law? What is it?

It states that equal volumes of gases contain the same number of molecules if they are at the same temperature and pressure

Whats a real-life example of avogadro's law?

A balloon is being blown up and air is being blown into it; you are adding more gas molecules (n). As a result, the volume (V) increases, and the balloon expands. If you let air out, the number of molecules decreases, so the volume shrinks.

Combined Gas law? What is it ?

It describes how pressure, volume, and temperature of a constant amount of gas affect each other simultaneously. ( can use in any gas law problem and if theres a constant cross it out !)

Are stp conditions? (temperature pressure and molar volume )

Standard temperature 0 Celsius (273.15 K)

Standard pressure 1 atm (760 mm Hg)

Molar Volume 22.4 L (per mole)

Ideal gas Law PV=nRt

equation of state that desribes the behavior of a hypothetical ideal gas

PV =nRT what do they stand for and their unit?

P = Pressure (torr , atm, and mm Hg)

n = Amount of substance (moles)

R = ideal gas constant (0.08206 L x atm / (mol x K))

T = Temperature ( Convert celsius to Kelvin (K = Celsius + 273.15))

Molar Volume of Ideal gas at Standard Temperature and Pressure (STP)

22.4 liters (L)

The molar volume of a gas is the volume occupied at STP by what?

22,400 mL of gas

Charles Law Formula is what? and use for?