Gas Review

For an ideal gas several assumptions are made about the particles including

• they collide elastically with each other and the container wall

• they experience significant intermolecular forces

• the volume they occupy as individual particles is insignificant compared to the volume of the container

• there are a very large number of particles inside the container

At a constant pressure, the volume decreases.  What happens to the temperature?

• increases
• decreases
• stays the same

At a constant volume, the pressure increases.  What happens to the temperature?

• increases
• decreases
• stays the same

At a constant temperature, the volume decreases.  What happens to the pressure?

• increases
• decreases
• stays the same

A 7.00 L sample of argon gas at 420. K exerts a pressure of 625 kPa.  If the gas is compressed to 1.25 L and the temperature is lowered to 350 K, what will be its new pressure in atm?

• 10.4 atm
• 2920 atm
• 2916.7 atm
• 28.8 atm

What explains the very high melting and boiling point of water

• Strong dipole-dipole bonds between water molecules
• Strong hydrogen bonds between water molecules
• Dispersion forces which are present in all molecules
• Asymmetrical shape of the polar bonds.

Tags

NGSS.MS-PS1-4

Hydrogen bonding occurs when hydrogen is bonded to N, O, or F.  Which of the following has hydrogen bonding?

• CBr₄
• NO₂
• H₂S
• NH₃

Does HF have hydrogen bonding?

• yes
• no

Does HCl have hydrogen bonding?

• yes
• no

Which is the second strongest intermolecular force, after hydrogen bonding?

• dipole-dipole attraction
• London forces

Tags

NGSS.HS-PS1-3