Test week 3, C 1, HVT

• Scheikunde
• Middelbare school
• vwo
• Leerjaar 1

In which state of matter are the particles mostly touching but arranged in a random way?

1. Solid
2. Liquid
3. Gas

In which state of matter do the particles have the most energy?

1. Solid
2. Liquid
3. Gas

Why can liquids not be compressed easily

1. The particles are in a random arrangement
2. The particles are closely packed
3. The particles are free to move over each othe

Why do solids have a fixed shape?

1. The particles are fixed in plac
2. The particles are closely packed
3. The particles vibrate

What is the name of the change when a liquid becomes a solid?

1. Melting
2. Boiling
3. Freezing

What is sublimation?

1. When a solid turns into a gas
2. When a gas turns into a solid
3. When a gas turns into a liquid

What eventually happens if energy is continually removed from a liquid?

1. It boils
2. It evaporates
3. It freezes

What eventually happens to a gas if its pressure is increased?

1. It condenses
2. It evaporates
3. It melts

Was the substance being heated or cooled?
How do you know this?

What was the melting temperature?

What was the temperature after 5 minutes?

Describe in detail what happens when water boils. Use ideas about particles to explain what happens. In this question you get marks for how well your answer is written. You will get marks for:

Jackie and Saffia are investigating saturated solutions. Explain the meaning of ‘saturated solution’.

A student records the temperature of a substance for a period of several minutes. Her results are recorded in the table below.
Draw a LINE graph of her results with temperature on the vertical (side) axis and time on the horizontal axis. Make sure that you label the axis correctly and draw a line of best fit. (Draw in your notebook and upload the photo here)

Was the substance being heated or cooled?

What was the freezing temperature?

What was the temperature after 5.5 minutes?

What was happening at 8.5 minutes?