Gas Variables
This law states that the pressure of a gas is indirectly proportional to its volume when temperature and the amount of gas are held constant.
What phase change represents a substance turning from liquid to gas?
Vaporizing
Archimedes' Principle states that the buoyant force is equal to _____________________.
The weight of the fluid displaced by the object
What is solubility?
The ability of a substance to dissolve
How does increasing temperature affect the solubility of solids?
Increases solubility
A balloon is placed into a hot room and the size of the balloon expands. This is a representation of whose law?
Charles' Law
What phase change represents turning from a gas to a solid?
Deposition
A swimmer feels lighter when underwater. If the swimmer's weight on land is 700 Newtons, and the weight they feel underwater is 400 Newtons, calculate the buoyant force they experience.
300 N
A carbonated gas was dissolved into a liquid. What is the solute and what is the solvent?
Solute: gas Solvent: liquid
How does increasing temperature affect the solubility of gasses?
Decreases solubility
An increase in atmospheric pressure will ___________ the boiling point of a liquid. (increase, decrease, not affect)
Increase
What is the term used to describe all 3 states of matter existing at the same time?
Triple point
Buoyant Force is dependent on 3 things. What are they?
Gravitational acceleration, density of fluid, volume of displaced water
Which salt is least soluble at 90 degrees celsius?
Sodium chloride
What 3 things affect the rate at which a solute dissolves?
Grinding, stirring, heating
Explain how the marshmallow in the syringe activity represented Boyles' Law
Increase in volume with decreased pressure
State of matter is dependent on 2 things. What are they?
Pressure and temperature
Explain how increasing surface area allowed the aluminum boats to hold more marbles
Increased displaced water so increased buoyant force
What amount of potassium iodide at 55 degrees celsius makes a saturated solution?
220 g
Explain what supersaturated means.
A solution holds more dissolved solute than normally would at that temperature
A person develops an ear infection that leads to the accumulation of fluid behind the eardrum. This fluid buildup causes pressure and pain in the ear. To alleviate the discomfort, the person considers using a cold compress on the affected ear. Will this treatment be effective in reducing the pain? Why or why not?
This will help because decrease in temperature decrease in pressure
What is the term used to describe heat that is transferred during a phase change but doesn't change temperature?
Latent heat
Imagine a toy boat floating in fresh water. How would the buoyant force change if placed in salt water?
it would increase with increased fluid density
1. Which of the solution(s) appear saturated by looking at them?
2. What is the maximum amount of solute that will saturate the solution?
1. D and E
2. 3.6 g
Imagine the saturation point of sodium chloride is 30 g at 50 degrees celsius. If I add 10 more grams, does this make a supersaturated solution? Explain.
No, it has to be dissolved