AP Chem Dalton's Law of Partial Pressure

Front

What is Dalton's Law of Partial Pressure?

Back

Dalton's Law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of each individual gas.

Front

How do you calculate the total pressure of a gas mixture?

Back

Total pressure = Partial pressure of Gas 1 + Partial pressure of Gas 2 + Partial pressure of Gas 3 + ...

Front

What is a partial pressure?

Back

Partial pressure is the pressure that a single gas in a mixture would exert if it occupied the entire volume alone.

Front

What is the formula to find the partial pressure of a gas?

Back

Partial pressure = (Mole fraction of the gas) x (Total pressure of the gas mixture)

Front

What is the mole fraction of a gas?

Back

Mole fraction is the ratio of the number of moles of a specific gas to the total number of moles of all gases in the mixture.

Front

What is STP in terms of gas?

Back

STP stands for Standard Temperature and Pressure, which is defined as 0 degrees Celsius (273.15 K) and 1 atmosphere pressure.

Front

What is the volume of 1 mole of an ideal gas at STP?

Back

22.4 liters.

Front

If the pressure of a gas decreases, what happens to its volume?

Back

According to Boyle's Law, if the pressure decreases, the volume increases, provided the temperature remains constant.

Front

What is the relationship between pressure and volume in gases?

Back

Pressure and volume are inversely related; as one increases, the other decreases, when temperature is constant.

Front

What is the significance of the ideal gas law?

Back

The ideal gas law (PV=nRT) relates pressure (P), volume (V), number of moles (n), the ideal gas constant (R), and temperature (T) for an ideal gas.