Gas- Gen chem

What’s the formula for pressure?

Pressure = Force/Area

how do you increase the pressure of a gas?

Increase the force or decrease the area

What’s is 1atm in tor and mmhg?

760 tor or mmHg

What is the ideal gas?

When do gases mostly behave as ideal gases?

At high temperatures and low pressures

Wha do we assume about ideal gases?

1. gas particles experience 0 intermolecular forces with each other for container

2. gas particles volumes are insignificant compared to the container

3. gas particles are always in continuous random motion

4. particles collisions are elastic (no loss of kinetic energy)

5. average kinetic energy of a gas depends only on the temperature of the system

What is most true about ideal gases at low pressures?

gas particles volumes are insignificant compared to the massive space between them

What is most true about ideal gases at HIGH temperatures and for gases with weak intermolecular forces ?

gas particles experience 0 intermolecular force between themselves and their container

when do gases become less ideal?

at low temperatures

how do you calculate the density of a gas?

• density = (P x molar mass) / RT

• P= gas pressure

• R = ideal gas constant

• T = temperature

Wha is Dalton’s law of partial pressure?

• the total pressure inside a container filled with multiple gases is equal to the sum of all the gases individual pressures

What does grahamas law of effusion say about lighter gases? Whats the equation? $\sqrt{\frac{molweight2}{molweigh1}}$

• lighter gases (lower molar mass) escape a narrow slit more quickly

• effusion rate of gas 1 / effusion rate of gase 2 = sqrt (molecular weight of gas 2 / molecular weight of gas 1)