8. When you heat a sample gas, the sample gets a little bigger because? A. The particles move faster and get a little further apart. В. Heat helps the particles grow. C. Heating the sample makes it lighter. D. Heating has the particles slide past each other. 9. What happens to he molecules when they are cooled? A. They speed-up and spread out B. Tey stop moving. C. They slow down and out compress. D. They move closely together and speed up. 10. What is the molecules' responsibility during a phase change? A. To rearrange the matter into a new state. B. To move faster and faster. C. To stop moving. D. To clean the substance. 11. On a cold day, a person can see their breath. This is an example of what phase change? A. evaporation B. sublimation C. fre ezing D. condensation 12. A student noticed water on the ground at 5:00 am but observed it disappeared by 10:00 am. What phase change was responsible for turning the water into water vapor? A. Melting B. Evaporation C. Sublimation D. Fre ezing 13. The greater the speed of the molecules in the container, the? A. fewer the collisions there will be. B. lower the temperature and pressure. C. greater the temperature and pressure. D. lower the pressure only.
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✏️State of Matter
#8.) When you heat a sample gas, the sample gets a little bigger because?
#9.) What happens to he molecules when they are cooled?
#10.) What is the molecules' responsibility during a phase change?
#11.) On a cold day, a person can see their breath. This is an example of what phase change?
#12.) A student noticed water on the ground at 5:00 am but observed it disappeared by 10:00 am. What phase change was responsible for turning the water into water vapor?
#13.) The greater the speed of the molecules in the container, the?
Answer:
8.A
9.C (not sure)
10.A
11.A or C
12.B
13.D (not sure)
Explanation:
8.Molecules within gases are further apart and weakly attracted to each other. Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.
9.Cooling a substance decreases molecular motion. As molecular motion increases, the space between molecules increases. As molecular motion decreases, the space between molecules decreases.
10.What are the molecules responsible for during a phase change? to rearrange the matter into a new state.
11.At dew point, air can no longer hold water vapor; when air is cooled beyond dew point water vapor turns to liquid form, the physical process known as condensation. It is this liquid form of your breath – minuscule droplets of water – that creates the fleeting, misty cloud we see when breathing in cold weather
12. basta b po
13.If they move faster, the particles will exert a greater force on the container each time they hit the walls, which leads to an increase in the pressure of the gas. If the walls of the container are flexible, it will expand until the pressure of the gas once more balances the pressure of the atmosphere.