Question

Which of the sentences below is true about the molecules of water in pictures 1 and 2?Select one:a. The average kinetic energy of water molecules in picture 1 is the same as those in picture 2. b. The average kinetic energy of water molecules in picture 1 is greater than those in picture 2. c. The average kinetic energy of water molecules in picture 1 is less than those in picture 2. d. The molecules of water in both pictures have no kinetic energy.

Answer 1

When Temperature increases the velocity of the molecules increases, since the kinetic energy is given by:

`\begin{gathered} K=(1)/(2)mv^2 \\ Where: \\ m=mass \\ v=velocity \end{gathered}`

The velocity is directly proportional to the kinetic energy, therefore, the kinetic energy increases too.

Answer:

b. The average kinetic energy of water molecules in picture 1 is greater than those in picture 2.