Chemical Agents Oxidizer, what is an oxidizer? The word "burning" describes the oxidation of a fuel in air. A campfire, for instance, uses oxygen from the air to turn wood (cellulose) into steam (H2O) and carbon dioxide (CO2), among other things. So why do fireworks need an oxidizer? Simply because our atmosphere doesn't provide the chemicals with enough oxygen (O2) to sustain the rapid rate of burning that fireworks require in order to give off color, shoot into the air, or explode.
In the lamp you have two liquids which are: * Very close in density * Insoluble in one another Oil and water are insoluble in one another (that's where the expression "oil and water don't mix" comes from), but oil and water have very different densities (a volume of water weighs a lot more than the same volume of oil). They won't work, so you search to find two liquids that are very close in density and are insoluble. This site can help you in that search. (Alka Seltzer will substitute for heat ) Now you apply heat to the bottom of the mixture. In a liquid motion lamp, the heat usually comes from a light bulb.
The determined ratio was 1:1.01, Mg:O. Even though the ratio does round to the accepted 1:1 relationship, error likely occurred, and was contributed through loss of product during combustion. While heating, it was difficult to detect smoke. This would lower the calculated mass of oxygen, and its ratio number, while increasing the ratio number for magnesium. Secondly, upon inspection of the contents in the crucible, not all of the contents appeared white, suggesting that possibly not all the magnesium reacted.
14,178.1 J 0.76 g Heat of combustion of the candle = 18,655.4 J/ gram of wax burned 12. One source of error could be that some of the heat from the candle could have been released into the air and not absorbed by the can. Another source of error could be that the water could have not absorbed all the heat from the
Will a gas with a vapor density of 1.2 float or sink in air? Liquids flow like water but do not readily separate 12. What affect does the ambient temperature have on the ignitability of a liquid? The minimum temperature of a liquid at which it gives off vapors sufficient to form an ignitable mixture with air 13. Which properties make flammable gases such as acetylene so dangers in
People speculate endlessly about supernatural powers over pain and heat, or mysterious brain chemicals that block the pain and prevent burning. The simple explanation is that the capacity of light and fluffy coals to contain heat is very low, and the conductivity of heat from the light and fluffy coals to your feet is very poor. As long as you don't stand around on the coals, you will not get burned. (Think of a cake in a 450°F oven. The air, the cake, and the pan are all at 450°F, but only the metal pan will burn your hand.
Once the can was hot enough it was quickly placed in a bowl of ice cold water and the can crushed itself. This occurred due to the pressure on the outside of the can being much greater than that of the inside. When the water inside the can evaporated the inside was left with the steam occupying the volume inside of it. Once the can was submerged all of the steam dissipated leaving the inside empty allowing the pressure on the outside to crush it in. The marshmallow and balloon lab were similar to these two demonstrations.
The water boils, turning into gas known as water vapour. The reason liquids evaporate is that some of the molecules inside them are moving faster than others. The fastest of all have enough energy to escape from the liquid, even though the temperature may be well below the boiling point. To get the gas back into a liquid, it needs to be condensed. The opposite of boiling is CONDENSATION (Boiling point is 100 degrees).
| The variables must be controlled so the experiment is a fair test otherwise the experiment is not accurate. | 3.2 Equipment list -2m Hydrochloric Acid - 100mL beaker - Mylanta tablet -Stopwatch - Water - Bunsen burner -Gas -Tongs -Matches (light Bunsen burner) -Tongs 3.3 Safety Assessment See Risk Assessment sheet for safety hazards 3.4 Method - 20mL of Hydrochloric Acid was poured into a beaker - The 1st tablet was placed into the HCL and the time from star to finish
There was a low efficiency rate for this experiment; energy was most likely wasted into the surrounding environment when the burner was alight. Possible ways to improve this experiment would be to possibly do the experiment in a more enclosed space, so as to disallow any heat escaping into the surrounding atmosphere. A fume cupboard would be suitable (when it is not turned on) as there is less movement in the air to move the energy from its intended target. The thermal energy was not only going into the water, but the can of the calorimeter became hot too, meaning that the thermal energy was transferred into the metal surrounding the water, and not just the