Name: ___________Naomi Scharf___________________________ Date: 3/17/11________________________
Student Exploration: Boyle’s Law and Charles’ Law
Vocabulary: absolute zero, Boyle’s law, Charles’ law, Kelvin scale, pressure
Prior Knowledge Question (Do this BEFORE using the Gizmo.)
A small helium tank measures about two feet (60 cm) high. Yet it can fill over 50 balloons! How can such a small tank contain enough helium to fill so many balloons?
_The tank is compressing the helium into a denser state but when it is put in the balloons it expands and takes up more space. __________________________________________________________________________
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Predict: If the added mass on the lid was 50 kg, a total mass of 60 kg would exert pressure on the gas inside the container. What would be the volume of the gas? __.42 ______________
7. Test: Test your prediction using the Gizmo. What is the volume of the gas? __.42___________
Was your prediction correct? ____yes_________
8. Create a graph: Select the GRAPH tab. Set the mass slider to 0 kg, and click Record to plot a point on the graph. Plot a point for each possible mass to create a graph showing the relationship between pressure and volume.
When your graph is completed, click the camera icon () to take a snapshot. Paste the image into a blank word-processing document, and label the graph “Volume vs. Pressure.”
A. What is the shape of the graph? __a curved, decreased line _______________________________________
B. How does this graph illustrate Boyle’s law? As more pressure is added the volume decreases and the graph shows this because it is decreasing as well. _________________________________
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9. Apply: Think about a small helium tank that can fill 50 balloons. What must be true about the helium in the tank compared to the helium in the balloons?
___The helium in the tank must be more dense than the helium in the balloons. ______________________________________________________________________
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It can be used to inflate blimps, scientific balloons, and party balloons. It is also used to pressurize the fuel tanks of liquid fueled rockets, in supersonic windtunnels and as a inert shielding gas for arc welding. It is combined with oxygen to to create anitrogen free atmosphere for deep sea divers so that they will not suffer from a condition known as nitrogen narcosis. Liquid helium is a cryogenic material and is used to study superconductivity and to create superconductive magnets. Jefferson Lab uses large amounts of liquid helium to operate its super conductive electron
Helium floats because it is lighter than the air around us. A liter of helium weighs way less than a gram. It only weighs 0.18 grams. A liter of the air around weighs
In a blimp, all of the helium fits into a massive tank where most of a blimps weight
If blown up with normal oxygen, balloons remain on the ground and while they can be tossed across a room, an oxygen filled balloon will still fall to the floor or any structure it can land on indoors. Since helium is lower in density than oxygen, when you fill a balloon with helium the balloon starts to rise to the ceiling instead of sink to the ground. This is why helium is most commonly used for balloons at parties. Now as previously mentioned, it is commonly known what the side effects are for inhaling helium but very rarely is it known the dangerous consequences that can occur when inhaling helium. Helium is not flammable and there are no specific recommendations for handling the gas. The risks involved with helium can include the inhalation of the gas and being exposed to the liquid form. Inhaling the gas can eventually cause suffocation in the most serious cases, frequent side effects of inhaling small amounts usually result in high voice, dizziness, and sometimes headaches can occur. Coming in contact with the liquid form of helium either on the skin or in the eyes could result in
Helium has many other really important uses other than filling up balloons that will end up harming the environment anyways. One important use for Helium is that the gas is used for scientific experiments.
According to Boyle’s Law, the volume of any given amount of gas held at a constant temperature varies inversely with the applied pressure. In other words, when the pressure increases the volume decreases. When pressure decreases, volume increases. This can be derived from the following equation:
Molecules of the gas collide frequently with each other and with the walls of the containment vessel.
In this lab experiment, we tested and observed the relationship between gas pressure, volume, and temperature and how they relate to one another. In order to do this, you should understand the properties of gas. These properties consist of volume, temperature, and pressure. The relation of pressure and volume is described as the Boyle’s law. The relation of pressure and temperature is described as the Gay-Lussac’s law. The most important resources needed for this experiment is the gas pressure sensor, a syringe, a cooling and heating source to increase temperature, and the Lab Quest application to record measurements and graph it. According to Boyle’s law, if the results of pressure versus volume have an inverse relationship,
The first recorded mathematical description of buoyancy (and thus hot air balloon behavior) was developed by Archimedes over 2000 years ago in Greece (4). The bouncy force is summarized by Archimedes's principle , “the magnitude of the buoyant force is always equal the weight of the fluid displaced by the object.” (5)
· The range which it will measure is from 0 to 300mm in length well
In determining the relationship between volume and pressure, there are numerous scientific concepts to be considered. Firstly, understanding the concept of gas pressure is extremely important. So what is gas pressure? Gas pressure is the force on the system exerted by the gas. This pressure can be measured using a pressure sensor; it is often measured in millimeters of mercury (mmHg). Additionally, there is a standard pressure, which is 1 atm (standard atmosphere). Pressure is a pushing force, and it is determined by using a tool called a manometer. A manometer works by contrasting the pressure of the surroundings with the pressure of the system. Once it is confirmed that the temperature and number of particles in the system remains constant, the only factor affecting the pressure is the volume occupied by the gas. Higher temperatures result in more pressure, and more particles also result in more pressure, but once temperature and the number of particles are controlled, as the volume increases and decreases the pressure changes accordingly. Pressure has a specific relationship to temperature and the number of particles and these observations are scientifically proven. Pressure has a direct relationship with temperature in kelvins (c+273). This relationship exists because when the volume and number of particles remain unchanged, as the particles heat up, they have more energy and collide more causing more pressure. The absolute zero, or the temperature at which the pressure
dioxide is squished in the bottle and it is trying to escape. There are 40
Gases were then discovered that were lighter than air such as hydrogen and helium popularising balloons and airships. These balloons soon deflated stranding expeditioners in water or remote areas often drowning or dying from exposure to the elements. An improvement on this design utilised multiple cells but large masses of flammable gases caused disastrous deaths when they went up in flames. [2]
In order for it to work, Hot air balloons only had to create a buoyancy, the upward force an object feels from the surrounding air (Buzzle, 2017). In this case, the particles in the air collided with one another and, push tiny force of energy for the hot air balloon
When an ideal gas in a thermally insulated chamber is compressed the volume V and pressure P are