We can change a gas to liquid by the temperature and the pressure. nextreset

By decrease of temperature and increase of pressure

Explanation: Gas is the state of matter in which particles are very loosely bound and hence can easily move past one another very easily as the inter molecular forces are weakest.

Liquid is the state of matter in which particles are tightly bound as compared to gases as they have strong inter molecular forces as compared to gas.

Thus for converting gas to liquid, the molecules have to brought closer which can be done by decrease of temperature or increase of pressure.

Decrease in temperature decreases the kinetic energy and hence the random movement will be restricted. Increase in pressure will bring the molecules close. Thus converting gas to liquid.

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).

the temperature of the gas, in k, not celsius.