QUESTION 6 The graph shows how the temperature o…
QUESTION 6 The graph shows how the temperature of a substance changes as it is cooled over a period of 30 minutes. The substance is a gas at the start. Right-click on the button to open the data booklet in a new tab. Each letter on the graph may be used once, more than once or not at all. State when: 6.1 the particles in the substance have the most kinetic energy? 6.2 the particles in the substance are furthest apart? 6.3 the substance exists as both a gas and a liquid? 6.4 The moment that all the substance is solid? 6.5 Use the graph to estimate the freezing point of the substance. 6.6 Name the change of state directly from a solid to a gas. When smoke is viewed through a microscope, the smoke particles in the air appear to jump around. 6.7 What term describes this movement of the smoke particles? 6.8 Explain why the smoke particles move in this way.