If the temperature was less than the water bath in some places because only part of the pipet was immersed in the boiling water, the molar mass calculated would become lower. This is because the ideal gas law temperature value would be too low, therefore lowering the overall
The salts will be dissolved in distilled water by small quantities until the reaction reaches When ionic compounds dissolve in water, they either absorb energy from or release energy to the surroundings. If a chemical reaction absorbs heat from the surroundings, it is an endothermic reaction. If a solution releases heat to its surroundings, it is an exothermic reaction. The enthalpy of dissolution is the enthalpy change associated with the dissolution of a substance in a solvent at a constant pressure. The change in enthalpy relies on the concentration of the salt solution, because different concentrations will produce different enthalpies.
Next the freezing point which didn’t eliminate either of them. Next we look at the mass which was 7.465g/ml. This make me lean toward ethyl ether but the masses were still pretty close. Next we move to the solubility of the substances. They are both very soluble in alcohol and hexane so that doesn’t help, but in water ethyl ether is semi soluble and pentane is in soluble.
When salt is applied to ice, it lowers the ice’s melting point. This means that even if the temperature is still very low, the ice can still melt. Salt melts ice because it lowers the freezing point of water around the ice. The ice melts and is unable to refreeze except at a much lower temperature. Melting point is an important concept to understand in this experiment.
The dependent variables are the salt freezing, and the time it took to freeze. 2. The experiment’s hypothesis is incorrect. The lower the temperature, the less time it took for the water to freeze. Carmen believed that the more salt, the lower the temperature is.
Therefore the two kinds of fatty acids compete for same enzyme complex; however, monounsaturated fatty acids are formed in greater concentration than VLCSFA. The reduction in the elongation of VLCSFA and a diet low in VLCSFA will slow the demyelination
Where American energy policy is far less sensible is when it comes to the price reflecting the true cost. Tiny petrol taxes take no account of the damaging effects of pollution. This newspaper has long argued for a carbon tax to make dirty energy more expensive and thus curb demand. If that happened, some of the new oil might not be worth extracting: Canada’s heavy oil, for instance, emits about 6% more carbon dioxide than normal oil, which in turn can be 30% dirtier than gas. The biggest bonanza from all this new energy would be if the users paid the real cost of consuming oil and
It stops convection currents formed at the top of the flask thereby stopping convection. It also stops heat transfer by evaporation as the particles evaporating from the liquid surface cannot escape into the atmosphere (In case it is not a plastic cap, you have to skip the first point mentioned about conduction) • The glass surface inside reduces conduction as glass is a poor conductor. • Vacuum present between the walls of the container stop conduction and convection, as both these type of heat transfer need particles or a medium • Silver surfaces are good reflectors of heat energy. So they reflect the heat back into the hot liquid. This reduces the energy transfer by radiation.
The chief advantage of hydro systems is it costs a lot less than other sources of energy. Hydroelectric plants are immune to price increases for fossil fuels and do not require imported fuel. On the other hand as hydroelectricity is increased petroleum/oil should be decreased. Hydroelectric plants generally have small to none emissions of carbon dioxide and methane due to reservoir emissions, and emit other pollutants associated with combustion. Hydroelectric plants may be able to reshape water flows to more closely match daily and seasonal system energy demands.
(c) Air is made up of a mixture of gases, and is comprised of only 21% oxygen. The remaining gases would not be involved in the combustion process. On the contrary, the gases such as carbon dioxide may hinder the combustion process. Hence, if the bomb calorimeter were to be pressurised with air at 30 atm, it would result in an incomplete combustion of the fuel sample due to the lesser quantities of oxygen available. There would be a slower rate of combustion which leads to inefficient burning and less heat would be produced in the process.