Question

For most objects, when they are heated they:

O
O O
A. get bigger.
B. always have a phase change.
OC. get smaller.
D. always have a temperature increase.

Answer 1

When objects are heated, they can either get bigger or get smaller depending on the material and its thermal expansion coefficient. Water is an exception to this rule as it expands when heated from 0°C to 4°C but contracts and gets smaller when heated further. Not all objects undergo a phase change when heated.

Step-by-step explanation:

When objects are heated, they can either get bigger or get smaller, depending on the material and its thermal expansion coefficient. Most objects tend to expand when heated, meaning they get bigger in size. This is because when heated, the particles in the material gain kinetic energy, causing them to move more vigorously and take up more space, resulting in an increase in size.

However, there are also exceptions to this general rule. For example, water is an exception. It expands when it is heated from 0°C to 4°C, but it contracts and gets smaller when heated further. This is due to the unique behavior of water molecules and its maximum density at 4°C.

It is important to note that not all objects undergo a phase change when heated. A phase change occurs when a substance transitions from one state (solid, liquid, or gas) to another. Heating does not always lead to a phase change, and objects can expand or contract without undergoing a phase transition.

Learn more about how objects behave when heated