SUMMATIVE ASSESSMENT

What do you expect to happen to the volume of a gas if its pressure is doubled and its temperature is reduced to half?

• its volume is increased

• its volume is doubled

• its volume remains unchanged

• its volume is decreased

Which is most likely to happen when a closed vessel filled with gas is shaken for 2 minutes?

• the temperature inside the vessel increases

• the pressure inside the vessel increase

• the temperature and pressure inside the vessel increase

• both the temperature and pressure inside the vessel increase

1. Records show that the incident of tire explosion is high during summer season. Which of the following gives the best explanation for this observation?

• there are more travellers during summer vacation

• high temperature during summer season causes the air inside the tire to expand

• vehicles’ tires are not well maintained

• there is too much air inside the tires

Which of the following samples is highly compressible at high pressure and expandable at high temperature?

• oxygen gas

• aluminum sheet

• water

• ice

Which of the following phenomena best illustrates Charles’ Law?

• carbon dioxide being dissolved in water

• expansion of the balloon as it is being submerged in hot water

• breathing apparatus being used by a patient

• leavening agent causing the fluffiness of cake products

LeGarrette Blount decides to go scuba diving while on vacation in Mexico. As he swims deeper into the ocean, the pressure pushing on him increases. Based on the relationship in Boyle’s law, what would happen to the volume of a LeGarrette’s lungs with this increase in pressure?

• volume of the lungs would increase

• volume of the lungs would double

• volume of the lungs would have no change

• volume of the lungs would decrease

Michael Floyd is learning to calculate using the equation for Boyle’s Law. The problem states that the volume of a gas increased from 1.0 L to 3.3 L and the initial pressure was 1.5 atm while temperature was held constant. Michael calculated the problem and got the answer of 2.3 atm for the final pressure. Does this answer make sense? Why or why not?

• Yes, if volume increases then so does pressure.

• No, if volume increases then pressure should decrease.

• Yes, if volume decreases then pressure increases.

• No, if volume decreases then pressure should also decrease.

When pressure increases, volume will...

• stay the same

• decrease

• increase

• I don't know

What type of relationship to pressure and volume have?

• direct

• no relationship

• inverse

• I don't know

Which two variables must be held constant for Boyle’s Law to apply?

• pressure & volume

• temperature & moles (amount of gas)

• volume & temperature

• volume & moles (amount of gas)