Its relatively low temperature, high silica content and leads to blockages and powerful eruptions. This can mean that the eruptions caused by thick magma can be less frequent and more difficult to predict, meaning that when an eruption does occur, it is usually with little or no warning, which can lead to catastrophic consequences as any nearby settlement will be relatively unprepared for the effects of a violent volcanic eruption. Furthermore, acidic magma is more likely to produce
What is the reason for this difference in melting points? (3 points) Ionic compounds have higher melting and boiling points than covalent compounds. This is because the electrostatic attraction in an ionic bond is very strong which means lots of heat energy is needed to break it down. Ionic bonds have high melting and boiling points. On the other hand covalent bonds, the intermolecular forces are very weak and is easily broken,hence lesser heat is required and thus covalent bonds have lower melting and boiling points.
Which type of compound usually has higher melting points: ionic compounds or covalent compounds? What is the reason for this difference in melting points? (3 points) - Ionic compounds have higher melting and boiling points than covalent compounds. The electrostatic attraction in an ionic bond is very strong hence a lot of heat energy is required to break it down, ionic bonds have high melting and boiling points. However, in covalent bonds, the intermolecular forces are very weak and easily broken, hence lesser heat is required and thus covalent bonds have lower melting and boiling points.
This explanation can be demonstrated in table 3 also because the results of the reactions demonstrates that chloride reacted more by the color of the product compared to the color of chloride in the mineral oil. Also it also demonstrates that iodine is the weakest oxidizing agent because the results show that iodide didn’t change much from the color that it showed in the mineral oil. In example 6 we have shown the activity series for the halogens used in this
Theoretically speaking, if we use one granule of zinc and one granule of iodine opposed to one granule of Barium Iodide and one granule of Zinc Sulfate, the cost would be $.2123 in total for the elemental reaction and $.9265 for the double replacement reaction. In terms of safety, it is safe to say that the safer thing would be centrifuging since we are
The half reactions for this system are: Oxidation of 〖Fe〗^(2+): 〖Fe〗^(2+)→ 〖Fe〗^(3+)+1e^- Reduction of 〖MnO〗_4^-: 〖MnO〗_4^-+8H_3 O^++5e^-→ 〖Mn〗^(2+)+12H_2 O Which produces the following overall equation: 〖MnO〗_4^-+8H_3 O^++5〖Fe〗^(2+)→5〖Fe〗^(3+)+〖Mn〗^(2+)+12H_2 O Equilibrium is initially obtained at a very slow rate, therefore the titration is carried out in the presence of excess sulphuric acid (H_2 〖SO〗_4) at a high temperature; in order to drastically increase the rate at which equilibrium is attained. Potassium permanganate acts as its own satisfactory indicator since the reagent 〖MnO〗_4^- anion appears to be an intense purple colour while the product 〖Mn〗^(2+) cation has a colourless appearance. However, the end point must be read quickly as the permanganate end point gradually fades due to the 〖MnO〗_4^- reacting with the 〖Mn〗^(2+) that was formed during the titration. When performing the titration, one must be cautious as side reactions can occur and these side reactions must be prevented using appropriate chemical measures. If an insufficient amount of acid was
It is the viscosity of magma that largely determines the nature and power of an eruption and the resultant severity of the hazard. Basic magma has a high proportion of dissolved gases and low silica content, making it very fluid. On the other hand, acidic magma is very rich in silica and has a relatively lower temperature, making it very thick and slow moving. The more viscous the magma, the greater the potential for explosive eruptions and these represent the greatest potential hazards. Non-explosive eruptions tend to produce mostly lava flows, which do not represent a particularly serious hazard to people, however they will destroy farmland and buildings.
The reason for this I concluded, was the collision theory. At the higher molarities of Potassium Iodide there were too many moles and therefore too many collisions were happening. Therefore the product was being made almost instantly. When I reduced the concentration of the reaction this meant there were less particles of iodide in the system so the reaction was happening slower. I also lowered the concentration of Hydrogen Peroxide 0.017M.
The heat from the steam decreases the viscosity of the heavy crude oil or bitumen which enables it to move down into the lower well chamber. The steam and gases rise because of their low density compared to the heavy crude oil below. The gases released, such as carbon dioxide, methane, and hydrogen sulfide, tend to rise into the steam chamber, filling the void space left by the oil. Oil and water flow countercurrent, gravity driven drainage into the lower well. The condensed water and crude oil is recovered at the surface by pumps such as progressive cavity pumps that work well with high viscosity fluids and suspended
The air, the cake, and the pan are all at 450°F, but only the metal pan will burn your hand. Air has very low heat capacity and also low conductivity, so you can put your hand in the oven long enough to touch the cake and pan. The heat capacity of the cake is a lot higher than air, but since it has low conductivity you can briefly touch it without getting burned. The metal pan has a heat capacity similar to the cake, but high conductivity too. If you touch it, you will get burned.)