Courseworks

Show how pressure changes with temperature when the volume is constant

Secondly we put ice into the beaker and we checked the temperature of the water and the pressure when the Bunsen burner was off.3. We then turned the Bunsen burner on and checked the temperature at every 20(k).4. we repeated this to make the test reliable and valid, then we take the average of both sets of results.5. Due to water boils at 100�C and it doesn’t got higher so we had to stop the temperature at 100�C which is 373KThere seemed to be a constant pattern between the 2 sets of data, The pressure rises the same amount each time the temperature raised . In the graph you can see that the two sets or results i have collect are very similar meaning there are less gap for mistakes, while looking at the results i can predict that the higher the volume the higher the pressure.The resultsEvaluationIn conclusion I think that the pressure and temperature did have change throughout the test, the pressure was keeping the same pattern all the way through, to make the test more reliable I would have to repeat the test several times.ImprovementsRepeat the test more to get even more reliable results because there will be less space for errors. Use digital measuring equipment to have even more accurate results. we can also try the experiment with different starting temperatures to make sure it works the same way.Hot air balloonGenerally, a hot air balloon flies from 500 to 1500 feet. The air pressure 0 feet is 101.33 Kpa. The air pressure at 500 feet is 99.49 which is the lowest height hot air balloons fly at, 1500feet is 95.91which is usually the highest air balloons fly .The information tells us how much hot air is needed for different altitudes, The lower the altitude the more hot air will be needed to enable the balloon to float, Particles are more spread out at a higher altitude and we also know the hot air rises and cold air doesn’t, so the more hot air we have the higher the balloon goes so there is a higher altitude.The burner is designed to create enough heat to warm up the balloon quickly. It is most efficient only when wide open. There is no good way to maintain the exact temperature required to maintain equilibrium.Ideal Gas LawThe ideal gas law is a mathematical relationship between the volume pressure and temperature of a gas. For a given quantity of gas, the pressure, P, multiplied by the volume, V, divided by the temperature, T, remains a constant.Reference : www.Wikipedia.orgArchimedes’s principleArchimedes’s principle states that when an object is suspended in a fluid, the buoyant force acting on an object is equal to the weight of the fluid displaced. As a consequence of Archimedes’s principle, an object will float in a fluid if it is less dense than the fluid. Reference : www.Wikipedia.orgThe balloon filled with hot air is less dense than when it is filled with cool air. For the balloon to rise and lift the basket and passengers off the ground, the hot air in the balloon must have a low density. The balloon, basket, and passengers combination must weigh less than the total amount of air displaced by the balloon. Then the upward buoyant force exceeds the downward weight (gravitational force).Helium filled balloons float by the same principle because helium gas is much less dense than air.The hot air filling the balloon reduces its density according to the ideal gas law. When its total density is less than the density of air, it floats according to Archimedes’s principle.The density difference is greater when the air temperature is cooler, so hot air balloons are often inflated in the cooler predawn hours.Hot air balloons rises up because of the fundamental property of the hot air filled in them; air when heated becomes lighter (less denser) than the surrounding cold air. It is driven by breeze and so there is no control over the flight path. Moving up is controlled by heating the air with the help of burners suspended beneath it. As a result, the balloon rises to find its equilibrium with the surrounding air. Coming down is controlled by releasing the hot air from the balloon. Hot air balloon should be operated after studying the weather and making sure there are no strong winds.Eventually, the balloon will reach a maximum altitude. What will happen is the pressure inside will about equal the pressure outside. When the two pressures are equal, this is called equilibrium. At this point, the balloon weighs as much as the air its displacing, or you might say the upward force on the balloon due to the pressure difference (between the top and bottom of the balloon) is equal to the force due to gravity acting on the balloon, therefore the net force is zero and the balloon just hovers there.However by using the burner on the Hot Air balloon it can cause pollution which is now a treat to our environment, The technology to replace hot air balloons would to use the wind whilst you are high up where there are a lot of high speed winds which can generate energy.

Leave a Reply

Your email address will not be published. Required fields are marked *

Back To Top