In a word, temperature. A physical change will change the matter's state based on it's temperature. For example, water, H2O. You can increase the temperature to 212oF and it will change state from a liquid to a gas. You can decrease the temperature to 32oF and it will change state from a liquid to a solid. To answer your question, the process of doing so would be increasing or decreasing temperature of matter.
temperature
Evaporation is the process where a liquid state changes from its LIQUID state to a GAS state.
In order to know what two changes of state are involved in a process one needs to know what the process is.
The process that changes water into a gaseous state is called evaporation, where water is heated and transforms into vapor or steam.
Matter changes state because of temperature and pressure. These quantities bring change.
melting
Addition or removal of heat energy.
evaporation sir
Condensation is the process by which a gas changes into a liquid state due to a decrease in temperature or an increase in pressure. This transition causes the gas particles to come closer together and form a liquid phase. It is the opposite of evaporation.
Boiling
Water changes from liquid to vapor through the process of evaporation when it gains enough energy to break free from its liquid state. The process reverses when the vapor loses energy, condenses, and returns to a liquid state, known as condensation. These changes in state are influenced by factors such as temperature and pressure.
Sublimation is the process in which solid directly changes into gaseous state. In the case of changing gas into solid, the process is known as deposition.