5. Which best describes why the temperature of the ice pack decreases when the salt is dissolved by water?
The kinetic energy is transferred from the salt to the water when they collide, which causes a
temperature decrease because the salt particles slow down.
a.
b.
When water collides with the salt, kinetic energy is transferred to the salt, which causes the water
molecules to slow down and the temperature to decrease.
c. When the temperature decreases and the particles speed up, it is because kinetic energy is
transferred from the container to the particles when they collide.
d. The temperature decrease is caused by transfer of kinetic energy from the salt to the container when
they collide, causing the salt particles to slow down.
