Question

Water is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Which change of state has most likely taken place?

Answer 1

Step-by-step explanation:

In vapor state of water, molecules are far apart from each other as they have high kinetic energy. Hence, they move rapidly from one place to another. Therefore, the molecules are far apart from each other.

Whereas when the speed of molecules slow down then gaseous (or vapor) state of water changes into liquid state. As decrease in kinetic energy of molecules will bring them closer to each other.

Hence, we can conclude that change of state that has most likely taken place is liquid state.

Answer 2

The correct option for above statement is

a.from a gas to a liquid

Step-by-step explanation:

A liquid will be regenerate to a gas by heating. A gas will be regenerate into a liquid by increasing the pressure of a gas sample. A liquid will be regenerate to a gas by cooling. A gas will be regenerate into a liquid by cooling.