Which of the following statements does NOT apply to the particles in a liquid?They can move around one another (flow)They move randomly so as to fill the entire volume of their containerThe bonds between them are weaker than those between the particles in a solidThey are packed closely2What is meant by the internal energy of a system?The total kinetic and potential energy of the particles it containsThe total kinetic energy of the particles it containsThe energy which its particles release when they undergo nuclear reactionsThe total potential energy of the particles it contains3Under the right conditions, a substance can change directly from a solid to a gas.  What is this process called?EvaporationDepositionSublimationVaporisation4Which of the following processes can occur when the internal energy of a gas decreases?CondensationEvaporationFreezingSublimation5Which of the following does NOT apply to a physical change?It involves a change in the internal energy of a substanceNo new substances are formedMass is conserved (the mass before the change is equal to the mass after the change)The change is irreversible

Which of the following statements does NOT apply to the particles in a gas?The forces of attraction between them are very weakThey move randomlyThey move more quickly when the gas is heatedThey are not affected by gravity2A fixed amount of gas is held inside a container of fixed volume.  Which of the following will NOT occur when the gas is heated?Its particles will collide with each other (and the walls of the container) less frequentlyIts density will remain constantIts internal energy will increaseThe pressure which it exerts on the walls of the container will increase3A fixed mass of gas is held inside a container.  The volume of the container can be adjusted using a movable plunger.  What will happen when the plunger is moved outwards slowly (so that the volume of the container increases)?The pressure will decreaseThe pressure will increaseThe pressure will stay the sameIt is impossible to say what will happen to the pressure4A fixed mass of gas is held at a constant temperature.  What will happen to the pressure of the gas when its volume is halved?It is impossible to sayIt will halfIt will doubleIt will stay the same5The air inside a bicycle pump has a volume of 20 cm3 and a pressure of 100 kPa.  Calculate the pressure of this air when its volume is reduced to 5 cm3.  You may assume that the temperature of the air remained constant while it was being compressed.100 kPa25 kPa400 kPa10,000 kPa6A fixed mass of gas is held inside a container.  The volume of the container can be adjusted using a movable plunger.  When the plunger is pushed down quickly, the temperature of the gas increases.  Which of the following statements does NOT apply to this process?It causes the pressure of the gas to increaseEnergy is transferred to the gasWork is done by the gasThe particles that make up the gas move more quickly after the plunger has been pushed down

Which of the following BEST describes what happens to particles as a liquid freezes?Question 15Select one:a.they lose kinetic energy and become more spread outb.they gain kinetic energy and become more orderedc.the gain kinetic energy and lose freedom of movementd.they lose kinetic energy and lose freedom of movement

Which statement best describes the particles of a solid substance?

Determine which of the following statements best explains why liquids can flow.The particles are free to move around each otherAttractive forces do not keep the particles closeThe particles move at high speedsThe particles are held in fixed positions

Which of the following statements is NOT a part of the kinetic molecular theory of gases?Group of answer choicesGases consist of tiny particles of matter than are in constant motion.Gas particles don't lose energy when they hit each other and/or the walls of the container.Gas particles are separated by large distances .There are weak intermolecular forces between gas particles.