Unit 5 part 2

Front

What is the partial pressure of a gas in a mixture?

Back

The partial pressure of a gas is the pressure that gas would exert if it occupied the entire volume of the mixture alone. It can be calculated using the formula: Partial Pressure = (Mole Fraction) x (Total Pressure).

Front

If a gas mixture contains 25% of gas A and the total pressure is 8 atm, what is the partial pressure of gas A?

Back

2 atm

Front

What happens to air pressure as altitude increases?

Back

Air pressure decreases as altitude increases.

Front

What is the relationship between the percentage of a gas in a mixture and its partial pressure?

Back

The partial pressure of a gas in a mixture is directly proportional to its percentage in the mixture.

Front

What is an intramolecular attraction?

Back

Intramolecular attractions are the forces that hold atoms together within a molecule, such as covalent or ionic bonds.

Front

What occurs when intramolecular attractions are broken?

Back

When intramolecular attractions are broken, chemical bonds are broken.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the difference between a molecule and an atom?

Back

An atom is the smallest unit of an element, while a molecule is made up of two or more atoms bonded together.

Front

Define total pressure in a gas mixture.

Back

Total pressure is the sum of the partial pressures of all the gases present in a mixture.

Front

How do you calculate the partial pressure of gas C in a mixture with 50% C and a total pressure of 8 atm?

Back

Partial Pressure of C = (Mole Fraction of C) x (Total Pressure) = 0.50 x 8 atm = 4 atm.