States of Matter Practice Questions

Which substance is a liquid at $25\,^\circ\mathrm{C}$?

Put a cross ( ☒ ) in the box next to your answer.

☐ A $-39$, $357$

☐ B $113$, $445$

☐ C $-210$, $-196$

☐ D $660$, $2470$

A sample of substance B is heated from $20\,^\circ\mathrm{C}$ to $500\,^\circ\mathrm{C}$.

Name the two changes of state that take place and give the temperature at which each one happens.

Name the change of state that happens when solid carbon dioxide changes directly into carbon dioxide gas.

Describe how the arrangement and the movement of the particles in carbon dioxide gas are different from those in solid carbon dioxide.

The student blows out the candle. The pool of liquid wax cools and becomes solid again.

Name this change of state.

Explain why the melting of the wax is a physical change but the burning of the wax is a chemical change.

State the volume of gas that the student should record as the volume of carbon dioxide produced.

Explain, in terms of the particles in the gas, why the volume in the syringe decreases between 0 and 6 minutes.

Predict the physical state of oxygen at $-200\,^\circ\mathrm{C}$.

Both oxygen and water are made of small molecules. Explain, in terms of the forces between the particles, why oxygen is a gas at room temperature but water is a liquid.

A liquid is cooled at a constant rate and its temperature is recorded every minute. During the cooling the substance undergoes one change of state. The results are shown in the graph.

Explain the shape of the graph in terms of the changes in the movement and arrangement of the particles as the substance cools.

Explain, in terms of the arrangement, movement and energy of the particles, why a large amount of butane can be squeezed into the small canister as a liquid, and why the butane gas spreads to fill the whole room when the valve is opened.