Homework #36: Behavior of Matter Day 1-10 Part 2

Front

What is the primary direction of heat flow?

Back

From warmer to cooler substance.

Front

What are the two types of pure substances?

Back

Elements and compounds.

Front

Between which two points is Heat of Fusion on a heating curve?

Back

Between points B and C.

Front

At what point is water in a solid state on a heating curve?

Back

At point A.

Front

What happens when salt is added to ice?

Back

Lowers the freezing point of water.

Front

Define heat transfer.

Back

The movement of thermal energy from one object to another due to a temperature difference.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

Front

Explain the concept of melting point.

Back

The temperature at which a solid becomes a liquid.

Front

What is the significance of the heat of fusion?

Back

It is the amount of energy required to change a substance from solid to liquid at its melting point.

Front

Describe the process of freezing.

Back

The process of a liquid turning into a solid as it loses heat.