Friday, January 24, 2020

Should Marijuana Be Legalized? Essay -- Legalization of Marijuana

For thousands of years human beings have attempted to find ways to get passed the struggles of their lives. With the pain of the world stopping people from enjoying simple pleasures, sometimes there is a need for help. Marijuana brings millions of people relief from the pain they feel on a day-to-day basis. This completely natural plant which helped so many people has puzzled the leaders of our nation for a long time. The THC in marijuana causes its users to experience a mild-huluciginic or high. The effect that marijuana has on a person has prevented the product from being legalized. Many other details about the plant, like the speculation of it being a gateway drug, have put another blockage on its legalization. Even though there are speculations about the plant, the benefit that it brings to the table most definitely out way its disadvantages. The plants help benefit by supplying us as a natural ingredient for medicine; however, nowadays, some people have been using it wrongly. Sh ould marijuana be legalized? Many Americans have this question roaming through their heads. Marijuana is an illegal drug in the U.S. and many other countries; it comes from dried flowers and leaves of the hemp plant. It has been available since the 1960s, but is 20 times more potent than before. Many youngsters believe that marijuana should be illegalized. However, they fail to know its many long term side effects. In the long run marijuana usage has a very high effect on the person’s body. Also, it’s known for a fact that marijuana has a high rate for addiction. Some people also believe that marijuana is accepted as medical use; however this is not true. In my eyes, marijuana is illegal for extremely powerful reasons, and it should stay that way. As... ...ere is a side affect of this individual drug. As stated before, marijuana affect our health, such as short term memory and our logical thinking. Teens who have used marijuana, their health may have been affected by these illness. And it can’t easily be cure, because once you are addicted to marijuana it is very difficult for one to detach him or her self from the drug without any medical profession. To prevent unnecessary use of marijuana, the drug shouldn’t be used because can be very dangerous to the body and health. Beside from using such drug, it is better if we were to use a different one, not marijuana alone. Pain killer may relieve the pain of each individual, but there might be some side affect to it as well. Exercise, be active, and communicate can also solve unwanted problem, too. Not just the drugs alone. Works Cited about.com ic.galegroup.com

Thursday, January 16, 2020

Ib Chemistry – Energetics (Hl)

6. 1. 1 If the reaction produces heat (increases the temperature of the surroundings) then it’s exothermic. If it decreases the temp (i. e. absorbs heat) then it’s endothermic. Also, the yield of an equilibrium reaction which is exothermic will be increased if it occurs at low temps, and so for endothermic reactions at high temperatures. 6. 1. 2 Exothermic : A reaction which produces heat. Endothermic : A reaction which absorbs heat. Enthalpy of reaction : The change in internal energy (H) through a reaction is ? H. 6. 1. 3 H will be negative for exothermic reactions (because internal heat is being lost) and positive for endothermic reactions (because internal energy is being gained). 6. 1. 4 The most stable state is where all energy has been released. Therefore when going to a more stable state, energy will be released, and when going to a less stable state, energy will be gained. On an enthalpy level diagram, higher positions will be less stable (with more internal en ergy) therefore, if the product is lower, heat is released (more stable, ? H is negative) but if it is higher, heat is gained (less stable, ?H is positive). 6. 1. 5 Formation of bonds : Release of energy. Breaking of bonds : Gain / absorption of energy. 6. 2 Calculation of enthalpy changes 6. 2. 1 Change in energy = mass x specific heat capacity x change in temperature ? (E = m x C x ? T) 6. 2. 2 Enthalpy changes (? H) are related to the number of mols in the reaction. If all the coefficients are doubled, then the value of ? H will be doubled. Attention must be paid to limiting reagents though, because enthalpy changes depend on the amount of reactants reacted (extensive property of enthalpy). . 2. 3 When a reaction is carried out in water, the water will gain or lose heat from (or to) the reaction, usually with little escaping the water. Therefore, the change in energy, and so the ? H value, can be calculated with E = m x c x ? T where E is equal to ? H, m is the mass of water pres ent, and c = 4. 18 kJ Kg-1 K-1. This ? H value can then be calculated back to find the enthalpy change for each mol of reactants. 6. 2. 4 The solution should be placed in a container as insulated as possible, to keep as much heat as possible from escaping.The temperature should be measured continuously , and the value used in the equation is the maximum change in temp from the initial position. 6. 2. 5 The results will be a change in temperature. This can be converted into a change in heat (or energy) by using the above equation and a known mass of water. This can be used to calculate the ? H for the amount of reactants present, which can then be used to calculate for a given number of mols. 6. 3 Hess’ Law 6. 3. 1 Hess’ Law states that the total enthalpy change between given reactants and products is the same regardless of any intermediate steps (or the reaction pathway).To calculate: ?Reverse any reactions which are going the wrong way and invert the sign of their ? H values. ?Divide or multiply the reactions until the intermediate products will cancel out when the reactions are vertically added (always multiply/divide the ? H value by the same number). ?Vertically add them. ?Divide or multiply the resulting reaction to the correct coefficients. 6. 4 Bond enthalpies 6. 4. 1 Bond enthalpy (aka dissociation enthalpy) : The enthalpy change when one mol of bonds are broken homolitically in the gas phase. i. e. X-Y(g) -> X(g) + Y(g) : ? H(dissociation).Molecules such as CH4 have multiple C-H bonds to be broken, and so the bond enthalpy for C-H is actually an average value. These values can be used to calculate unknown enthalpy changes in reactions where only a few bonds are being formed/broken. 6. 4. 2 If the reaction can be expressed in terms of the breaking and formation of bonds in a gaseous state, then by adding (or subtracting when bonds are formed) the ? H values the total enthalpy of reaction can be found. 16. 1 Standard enthalpy changes of re action 16. 1. 1 Standard state : 101 kPa, 298 K (or 1 atm, 25 degrees celcuis).Standard enthalpy change of formation : The enthalpy change when 1 mol of a substance is made from its elements in their standard states. For example C(graphite) + 2H2(g) -> CH4(g). Molecules, like H2 are considered to be ‘standard state'. Fractions of mols (i. e. fractions in coefficients), may also be used if necessary as 1 mol must be produced). 16. 1. 2 If a reaction can be expressed in terms of changes of formation (and bond enthalpies as in SL) then add up all the ? H values to get the ? H for the reaction. 16. 2 Lattice enthalpy 16. 2. 1Lattice enthalpy : The enthalpy change when 1 mol of crystals (i. e. an ionic lattice) is formed from its component particles at an infinite distance apart. M+(g) + X-(g) -> MX(s) The value of lattice enthalpy is assumed to be positive for the separation of the lattice, and negative for the formation of the lattice. 16. 2. 2 As above, lattice enthalpies just a dd another type of reaction to those which can be shown on the Born-Haber cycle. 16. 2. 3 Lattice enthalpy increases with higher ionic charge and with smaller ionic radius (due to increased attraction). 6. 3 Entropy 16. 3. 1 Factors which increase disorder in a system: ?Mixing of particles. ?Change of state to greater distance between particles (solid -> liquid or liquid -> gas). ?Increased particle movement (temperature). ?Increased number of particles (when more gas particles are produced, this generally outweighs all other factors). 16. 3. 2 Predict the sign of ? S (the change in entropy) for a reaction based on the above factors. ?S is positive when entropy increases (more disorder) and negative when entropy decreases (less disorder). 16. 3. 3The standard entropy change can be calculated by subtracting the absolute entropy of the reactants from that of the products. 16. 4 Spontaneity of a reaction 16. 4. 1 Reactions which release heat (and so increase stability) tend to occur as do reactions which increase entropy (? S is positive). Neither of these can be used to accurately predict spontaneity alone however. 16. 4. 2 When ? G is negative, the reaction is spontaneous, when it's positive, the reaction is not. 16. 4. 3 ?G = ? H – Temperature(in kelvin) x ? S Spontaneity depends on ? H, ? S and the temperature at which the reaction takes place (or doesn't as the case may be). 6. 4. 4 Substitute values into the equation above. Hopefully that's not too tricky. 16. 4. 5 There are four possibilities: 1.? G is always negative when ? H is negative and ? S is positive. 2.? G is negative at high temperatures if ? H is positive and ? S is positive (i. e. an endothermic reaction is spontaneous when T x ? S is greater than ? H). 3.? G is negative at lower temperatures if ? H is negative and ? S is negative (exothermic reactions are spontaneous if ? H is bigger than T x ? S). ?G is never negative if ? H is positive and ? S negative.

Wednesday, January 8, 2020

In The Stag Hughes seems to comment on man’s...

In The Stag Hughes seems to comment on man’s relationships with nature With reference to The Stag and one other poem in the section discuss the poet’s treatment of conflict between man and nature. â€Å"In ‘The Stag’ Hughes seems to comment on man’s relationships with nature† With reference to ‘The Stag’ and one other poem in the section discuss the poet’s treatment of conflict between man and nature. The Stag was written by a poet named Ted Hughes and is similar to the poem Roe-Deer in many respects because they feature many similar ideas. The poem is about the distant relationship between humans and nature, in this case it is a Stag the represents the natural side and its actions compared to the humans and their actions. The†¦show more content†¦Ted Hughes expresses part of his feeling as he says â€Å"pulled aside the camouflage of their terrible planet† this tells us that he sympathises with the stag and is disgusted at our behaviour. It is also interesting that the animals who have been brought into are world have also been turned barbaric, such as the hounds which have been taught to hunt the stag for no reason as it does not need to kill it for survival reasons it is just doing it through command of the hunters. The poem also portrays the Stags innocence and helplessness by using phrases such as â€Å"his limbs all cried different directions to his lungs, which only wanted to rest† and â€Å"doubled back weeping† As I said before Roe – Deer written by the same poet features a similar ‘encounter’ between human and wildlife. It shows the lack of communication between nature and us. â€Å"They happened into my dimension† backs up the different world theory that Ted Hughes has and in The Stag there is a constant contrast between nature and us. The poem is about a person having an encounter with a Roe – Deer but because of us driving nature away it emphasis on how magical it is to see a wild animal. Ted Hughes uses words in this poem such as â€Å"secret deerhood† and â€Å"hesitated† as a way to describe how the deer have become secret to keep away from humans and hesitated shows us how scared the wildlife is of us and our technology. ThroughoutShow MoreRelatedA Picatrix Miscellany52019 Words   |  209 Pages1634) to Elias Ashmole (d. 1692) to William Lilly (d. 1681). E.M. Butler wrongly associates it with Gio. Peccatrix, (no doubt a pseudonym) who edited an Italian version of the Key of Solomon (British Library, Sloane manuscript 1307). Misled by some comments by Mathers and others, Dr. Butler incorrectly concluded that the Picatrix was â€Å"an Italian edition of the Clavicle, strongly impregnated with black elements† (Ritual Magic, 19 49, p. 135.) Recent editions include: Arabic Pseudo-Magriti, Das Ziel des