How does a sample of helium at 15 °c compare to a sample of helium at 215 k? the helium at 15 °c has a higher average kinetic energy than the sample at 215 k. the helium at 15 °c has lower nuclear energy than the sample at 215 k. the helium at 15 °c has slower-moving atoms than the sample at 215 k. the helium at 15 °c has smaller atoms than the sample at 215 k.

The correct answer is: 'The helium at 15 °C has a higher average kinetic energy than the sample at 215 K'.

Explanation:

Average kinetic energy of the helium atom at 15 °C .

Temperature of the gas = T = 15 °C = 288.15 K

Average kinetic energy is determined by formula:

Average kinetic energy of the helium atom at 215 K.

Temperature of the gas = T' = 215 K

Average kinetic energy is determined by formula:

The helium at 15 °C has a higher average kinetic energy than the sample at 215 K.Hence, it is the correct option.