Total and Average Kinetic Energy

Which of the following substances is made up of particles with the highest average kinetic energy?

• Fe(s) at 35ºC

• Br₂(l) at 20ºC

• H₂O() at 30ºC

• CO₂(g) at 25ºC

Tags

NGSS.HS-PS3-2

At which temperature would the molecules in a one gram sample of water have the lowest averagekinetic energy?

• 5ºC

• –100ºC

• 5 K

• 100 K

As ice cools from 273 K to 263 K, the average kinetic energy of its molecules will

• increase

• decrease

• remain the same

As a substance undergoes a change from the solid to the liquid phase, at constant temperature, the average kinetic energy of its molecules

• decrease

• increase

• remain the same

Tags

NGSS.MS-PS1-4

The average kinetic energy of the molecules of a gas is directly proportional to the

• number of moles present

• volume occupied by individual gas molecules

• temperature measured on the Kelvin scale

• pressure at standard temperature

Tags

NGSS.HS-PS3-2

Different masses of copper and iron have the same temperature. Compared to the average kineticenergy of the copper atoms, the average kinetic energy of the iron atoms is

• less

• greater

• the same

At which conditions of temperature and pressure would the molecules of a gas have the greatest average kinetic energy?

• 0°C and 3 atm

• 10°C and 2 atm

• 50°C and 4 atm

• 100°C and 1 atm

The temperature of a substance is a measure of its particles

• average potential energy

• average kinetic energy

• specific heat

• total energy

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

As ice at 0ºC changes to water at 0ºC, the average kinetic energy of the ice molecules

• increase

• decrease

• remain the same

Tags

NGSS.HS-PS3-2

At which temperature does an aqueous solution of LiCl have the highest average kinetic energy?

• 100°C

• 200°C

• 273 K

• 373 K

Tags

NGSS.HS-PS3-4