Understanding Heating and Cooling of Substances

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Questions and Answers

What happens when a substance is heated?

Energy is transferred to the substance, causing the atoms/molecules to move faster and the volume to increase. (correct)
The atoms/molecules themselves expand, causing the volume of the substance to increase.
Energy is transferred from the substance, causing the atoms/molecules to move slower and the volume to decrease.
The atoms/molecules themselves shrink, causing the volume of the substance to decrease.

What is the relationship between the speed of atoms/molecules and temperature?

Temperature is not a measurement of the average speed of atoms/molecules.
The slower the atoms/molecules move, the higher the temperature.
There is no relationship between the speed of atoms/molecules and temperature.
The faster the atoms/molecules move, the higher the temperature. (correct)

What happens to the volume of a substance when it is cooled?

The volume decreases as the atoms/molecules move closer together. (correct)
The volume increases as the atoms/molecules move closer together.
The volume increases as the atoms/molecules spread further apart.
The volume remains the same as the atoms/molecules do not change their spacing.

How do the collisions between atoms/molecules change when a substance is warmed?

<p>The collisions become stronger and more frequent. (D)</p> Signup and view all the answers

What happens to the atoms/molecules themselves when a substance is heated or cooled?

<p>The atoms/molecules do not change in size, only their spacing changes. (C)</p> Signup and view all the answers

Flashcards

What happens to a substance when it is heated?

The kinetic energy of the substance increases, causing atoms or molecules to move faster and spread further apart.

Temperature and molecule speed

The temperature of a substance is directly proportional to the average kinetic energy of its atoms or molecules. So, faster movement means a higher temperature.