Review for the final exam Chemistry

State what is meant by diffusion

Which of these two gasses diffused faster?

• H2

• O2

• Same rate, both slow

• Same rate, both fast

Choose one of the gases. Write at least 3 reasons why it diffused faster/slower?

Organize the following states of matter (from fastest to slowest), according the speed (rate) of diffusion:

• gas - liquid - solid

• solid - liquid - gas

• freezing - melting - boiling

• boiling - melting - freezing

This is a phase change graph (T°/time). In which moment(s) is there only one state of matter present?

• A-B-C-D-E

• A-C-E

• B-D only

• E only

This is a phase change graph (T°/time). In which moment(s) are more than one state of matter present?

• A-B-C-D-E

• A-C-E

• B-D only

• E only

This is a phase change graph (T°/time). In which moment is there the highest increase in the kinetic energy of particles?

• A-B-C-D-E

• A-C-E

• B-D only

• E only

This is a phase change graph (T°/time). In which moment(s) is heat energy being supplied?

• A-B-C-D-E

• A-C-E

• B-D only

• E only

• none of the above

This is a phase change graph (T°/time). In which moment(s) is heat energy removed?

• A-B-C-D-E

• A-C-E

• B-D only

• E only

• none of the above

What two things are increasing in this image?

• Pressure

• Number of particles

• Mass of the particles

• Volume

• Temperature