AP Chemistry gas laws ideal gas

What is the ideal gas law?

The ideal gas law relates pressure, volume, temperature, and amount: $\displaystyle PV = nRT$.

Define pressure in the context of gases.

Pressure is the force exerted by gas particles colliding with a surface, often measured in atm or mmHg.

Ideal gas constant (R) value?

$\displaystyle R = 0.0821 \, L \, atm \, K^{-1} \, mol^{-1}$ or $\displaystyle 62.36 \, L \, mmHg \, K^{-1} \, mol^{-1}$.

True or false: Gases have a definite shape.

False, because gases fill the shape of their container.

Difference between real gases and ideal gases?

Real gases deviate from ideal behavior under high pressure and low temperature due to intermolecular forces.

What is Boyle's Law?

Boyle's Law states that pressure and volume are inversely related at constant temperature: $\displaystyle P_1V_1 = P_2V_2$.

What does Charles's Law describe?

Charles's Law describes the direct relationship between volume and temperature at constant pressure: $\displaystyle \\frac{V_1}{T_1} = \\frac{V_2}{T_2}$.

Fill in the blank: Avogadro's Law states $\displaystyle V \propto n$ at constant ___ and ___

pressure and temperature.

What is the combined gas law?

The combined gas law is $\displaystyle \\frac{P_1V_1}{T_1} = \\frac{P_2V_2}{T_2}$, combining Boyle's, Charles's, and Gay-Lussac's laws.

What is Dalton's Law of partial pressures?

Dalton's Law states that the total pressure is the sum of partial pressures: $\displaystyle P_{total} = P_1 + P_2 + ... + P_n$.

True or false: Temperature affects gas pressure.

True, because increasing temperature increases particle kinetic energy, raising pressure.

What is Gay-Lussac's Law?

Gay-Lussac's Law states that pressure is directly proportional to temperature at constant volume: $\displaystyle \\frac{P_1}{T_1} = \\frac{P_2}{T_2}$.

How does increasing volume affect gas pressure?

Increasing volume decreases gas pressure, according to Boyle's Law.

What does STP stand for?

STP stands for Standard Temperature and Pressure: 0°C (273.15 K) and 1 atm.

Fill in the blank: The average kinetic energy of gas molecules is directly proportional to ___

the temperature of the gas in Kelvin.

Difference between absolute pressure and gauge pressure?

Absolute pressure measures total pressure, while gauge pressure measures pressure relative to atmospheric pressure.

What is the significance of the ideal gas equation?

The ideal gas equation allows calculation of any gas property if the other variables are known.

True or false: All gases behave ideally.

False, because real gases deviate from ideal behavior under certain conditions.

What happens to gas volume when temperature increases?

Gas volume increases, according to Charles's Law, assuming pressure remains constant.

How can you determine the molar mass of a gas?

Using the ideal gas law: $\displaystyle M = \\frac{dRT}{P}$, where $\displaystyle M$ is molar mass and $\displaystyle d$ is density.

What is the relationship between density and molar mass of a gas?

Density is directly proportional to molar mass at constant temperature and pressure: $\displaystyle d = \\frac{PM}{RT}$.