Question
(e) Which two statements are correct about the particles when a liquid turns into a gas? Tick two boxes. Particles are bigger Particles are lighter Particles have more chemical energy Particles have more kinetic energy Particles move faster
Answer
4.2
(330 Votes)
Jeffrey
Master · Tutor for 5 years
Answer
Particles have more chemical energy, Particles have more kinetic energy
Explanation
When a liquid turns into a gas or vaporizes, the same particles that formed the liquid now occupy a greater volume. Chemical and physical properties do not change, so the particles do not get bigger or lighter. However, temperature measures the average kinetic energy of particles. The process of vaporization usually involves an increase in temperature which means the magnitude of particle movement speeds up and thus leading to greater kinetic energy. At the same time, more energy is needed in order to overcome the cohesive forces that hold the attracting particles together. Thus, particle kinetic energy and chemical energy both increase.