Question

Which of these best describes how the kinetic energy of carbon dioxide molecules change as the carbon dioxide is heated?

Kinetic energy decreases.
Kinetic energy increases.
Kinetic energy increases, then decreases.
Kinetic energy decreases, then increases.

Answer 1

\(\sf \color{red}{HINT}\): Well, if you're adding heat to carbon dioxide, you know there's going to be a phase change. What does that suggest?

Answer 2

C

Answer 3

Well, why would it decrease?

Answer 4

Crap I don't know

Answer 5

What does Kinetic energy of carbon dioxide molecules change as the carbon dioxide is heated? Temperature measures the average Kinetic energy of the molecules of a substance. Kinetic energy = ½ * mass * velocity^2 As temperature doubles, the kinetic energy doubles, and the velocity of the molecules quadruples. Or course, temperature must be measured in Kelvin or Rankine degrees. These temperature scales have their 0 at absolute 0.

Answer 6

So B

Answer 7

?

Answer 8

yup