Chapter 7 Review

Sec 1E_1NA_ LSS 1 Topical TestTopic: Chapter 7 Particulate Nature of Matter Name: …………………………….. ( ) Class:…………Date: …………………1Air can be compressed because Abonds between the particles cannot be broken.Bparticles are not vibrating fast enough.C particles are packed very closely together.Dthere is a lot of space in between particles. ( )2A substance has a boiling point of 90°C. What changes occur when it is heated from 50°C to 120°C?Aenergy of particles increase; particles move further apartBenergy of particles increase; particles move closer togetherCenergy of particles decrease; particles move further apartD energy of particles decrease; particles move closer together( )3A solid iron bar is heated below its melting point. This means theAiron atoms increases in size.Biron bar melts to form molten iron.Ciron atoms move further apart to take up empty spaces in the room.D iron atoms vibrate more vigorously slightly apart and the iron bar expands.( )

Sec 1E_1NA_ LSS 2 4(a) Describe, in terms of movement and arrangement of the particles, what happens when a liquid boils to form a gas.…………………………………………..…………………………………………..………..…………………………………..…………………………………..……………………….... [2](b) In the box below, draw the arrangement of particles in a liquid. [1]5Three beakers, labelled I, II and III were each filled with 50 cm3 of distilled water. The temperature of the water was set at 20 oC, 35 oC and 60 oC. 1 g of copper(II) sulfate crystals was added to each beaker, dissolves and diffuses throughout the water. (a) What is the meaning of the term diffusion?…………………………………………..…………………………………………..………..…………………………………..……………………………………………[2](b)In which beaker did copper(II) sulfate take the shortest time to completely diffuse throughout the water.Explain your answer.…………………………………………..……………………………………...…………..……………………………..…………………………………………………... [2]