Heat Of Light Lab

In this experiment, the results of the tested materials gave off heat and the change in the temperature was positive because when one substance was added to another the temperature increased. A calorimetric constant is required because the calorimeter that was made is different for every lab group.

The purpose of this lab is to observe how heat is released or absorbed with different chemicals.

The other interesting trend is that in the last three minutes of trial 3, the temperature of matte black, glossy black and matte white stayed constant (refer to figure 5 and appendix 3). The same pattern took place in trial 2. The temperature stayed constant because the heat capacity of the can was almost filled to the maximum amount. If the can had a larger heat capacity, then the temperature would have

We have also discovered that when mixing an acidic compound with the indicator it had an green or a fuschia. When an alkalis compound was mixed with the indicator it would result in a green or a reddish type of

Take the temperature of each square with the infrared thermometer, three times over a time period of about 1 minute. Record the data in a data table in your lab notebook.

When each substance individually mixes with the contents to be tested, a peculiar reaction may occur if the circumstances are correct. For example, Biuret indicators only change into a purple-ish colour when proteins are present within the tested substance. If there is not enough

How does light bend? In science, we have created a lab with the purpose, to see how light behaves when it passes through various mediums. Our problem at hand is to sneak past the laser security in the White House to kidnap Donald Trump. What we will be doing in this lab is shining a ray of light from air to water at 30 degrees, then measure the intensity. Next we will switch the mediums from air to glass, and repeat the same process. Last, switch the mediums from water to air (and repeat). Our hypothesis is, if we can find a object to bend the light around us then we will be able to sneak past security. Using a computer simulator, we proceeded with our experiment and took a look at the angles, the speed, the wavelength and the intensity of light. Here’s what we found.

The information from the experiment could be useful in fields that study things based on light. Fields like in astronomy see that the light that they receive might be distorted a lot based on the temperatures of liquids in spaces. This could be useful because stuff like asteroids could have liquids that might reflect some light making it hard to detect. Also, light coming from other plants as the planet can distort light a lot due to atmosphere containing different temperatures. Though this experiment only tested light refraction from liquids there could be another experiment that could test if this priority of light could be used on other mediums like air. This could be helpful in the matter of refraction on other planets.

The responding variable in our project is oxygen. Oxygen is a colorless gas that is essential to the

Incandescent light bulbs use a wire filament heated to a high temperature in order to give off light. The filament has an electrical current sent through it, and is protected from oxidation by a glass bulb or a quartz bulb. On average, the incandescent bulb uses 60 watts and costs 11 cents per kilowatt hour. On average, one bulb costs $1. 90% of what an incandescent light bulb produces is heat, which wastes a lot of electricity. Also, the lights produce sustainable levels of CO2. They have an average lifespan of 1,200 hours.

Ultraviolet (UV) light is a type of radiation that is invisible to the naked eye. UV light has a wavelength that ranges from one hundred nanometers to four hundred nanometers which is the reason we cannot see it. Interestingly, some animals can see the light and various insects as well. UV light comes from the sun, and too much of this is often responsible for the red “sunburn” that we are subject to after too much time in the sun. Things could be much worse, however, if the earth did not have its atmosphere which stops a large amount of UV light from making contact with us. UV light was discovered by a German physicist named Johann Ritter in the year 1801. Similar to the way infrared was

The hot/cold lab is an example of phase changes. With ice in water being slowly heated over a period of twenty five minutes, the three phases of matter were exhibited. The initial phase was a solid, the water used was ice. After being heated for around seven minutes, the solid ice had another phase change, it became a liquid, just water. At around twenty four minutes of being heated, the water finally boiled in order to change into a gas. The data we collected shows the increase in temperature as the phases changed. Antoine Lavoisier₁ was a French chemist who first wrote about these phase changes. He described the three different types of phases as “solid like stones...fluid like water...a third state which I shall call the state of expansion

The driving question for my PBL project is to see if the color of gas from dry ice can change colors. Me and my group used various colors to test this experiment. However our hypothesis was tested wrong and the food coloring had no effect on the color of the gas from dry ice.

By rising the temperature in an object, the hotter the object becomes and changes its color becoming bluer as its temperature rises.

In this experiment we wanted to determine the optimal temperatures for fungal, Aspergillus oryzae, and bacterial, Bacillus licheniformis. In order to see if any of the starch was broken down, Iodine was mixed with the starch-amylase substance. In four spot plates, the groups labeled the different temperatures, once the iodine came in contact with the starch, the result would be a reaction that turns the fluid into this dark blue/black color. In a span of 10 minutes, with occasional check ups on the solution every 2 minutes, the amylase-starch solution was placed into five types of temperature, all being Celsius. The five temperatures were 0 degrees, 25 degrees, 55 degrees, and 85 degrees Celsius. The solution would change colors, so in order to measure the changes, a scale was used. Such scale was a 1-5 scale, with colors next to each number. One being the lightest color, or yellow, and 5 being the darkest color, or black. Based on the change of color, we could tell how fast it hydrolyzed the starch in a span of 10 minutes. To keep record of the results, the results were put in Data Tables used from the Lab Manual. The average optimal temperature for Bacteria Amylase was 85 degrees Celsius, while the Fungal was 55 degrees Celsius. You can see this by looking for the