States of matter

The following are the standard states of matter, except .....

• solid

• liquid

• gas

• plasma

Changes of states directly from solid to gas (i.e. what happened to dry ice)

• melting

• freezing

• condensation

• sublimation

Freezing is an endothermic process.

• TRUE

• FALSE

According to the heating curve in the picture, what happen at (2)?

• melting process

• temperature in a liquid increases

• boiling process

• temperature in a liquid decreases

According to the heating curve in the picture, what happen at (3)?

• melting process

• temperature in a liquid increases

• boiling process

• temperature in a liquid decreases

What is the possible substance represented in this heating curve? (Hint: look at its melting and boiling temperature)

• oxygen

• hydrogen

• water

• copper

According to the table, which compound is a gas at room temperature (25 ^oC)?

• Iodine

• Methane

• Sodium chloride

• Sodium carbonate

According to the table, how many of it are solid at room temperature (25 ^oC)?

• 1

• 2

• 3

• 4

The diffusion rate in gas is faster compared to the diffusion rate in liquid.

• TRUE

• FALSE

Which states of matter has the highest kinetic energy?

• solid

• liquid

• gas