Physical chemistry Essay Example | Topics and Well Written Essays - 2000 words

Physical chemistry - Essay Example An understanding of the Le Chateliers principle and catalysis is essential for proceeding with this study. Increase in temperature: Exothermic reaction favours reactants, as the heat is absorbed to counterbalance the increase in temperature. Endothermic reaction favours products as the absorbed heat facilitates a larger amount of reactants to convert to products (Atkins & de Paula, 2006). Change in reactant concentration: An increase in concentration of a reactant in a dynamic equilibrium causes the reaction to favour products, as the excess reactant reacts with other reactants. A decrease in concentration of a reactant favours the reverse reaction as the products are converted to reactants in order to balance the decrease in reactant concentration. (Clark, 2002; Morrison & Boyd, 1992) Change in product concentration: A decrease in product concentration favours the forward reaction to balance the decrease. An increase in product concentration favours the reverse reaction. (Atkins & de Paula, 2006) Change in pressure: Increasing the pressure of a system at equilibrium causes changes in the partial pressures of reactants and products. The rate constant is independent of the change in pressure of a system, but depends on ratio of partial pressures of the reactants and products. The reaction moves in the direction where number of moles is less. (Atkins & de Paula, 2006) A catalyst accelerates a chemical reaction without undergoing a net chemical change. The catalyst reduces the energy of activation by altering the path of reaction to avoid the rate determining step, which is the slowest step in a reaction (Atkins & de Paula, 2006). For example, decomposition of hydrogen peroxide, which is a slow reaction at room temperature, requires activation energy of 76 kJ/mol. In the presence of iodide ions, this activation energy drops to 57 kJ/mol and rate constant

HCM621-0804A-01 Ethics, Policy, and Law in Health Care Management - Essay - 4

HCM621-0804A-01 Ethics, Policy, and Law in Health Care Management - Phase 3 Discussion Board - Essay Example In case of Arizona v. Maricopa County Medical Society, 457 U.S. 332 (1982), the â€Å"Supreme Court held that these maximum fee schedules represented per se unlawful price-fixing agreements.† (Austen, 2008). The issues involved in limiting both patients’ choices for providers and vice versa would be in terms of a perceived compromise in quality and standards of health care provision since individualized client attention and monitoring would be lower in such cases. This is evident in Government run health care centers where a single provider is assigned to take charge of large group of patients. In such cases the following issues could arise: Apparently, in efforts to control the administration of (new) drugs, the Federal government may issue strictures on the kind of drugs physicians could prescribe and the kind of drug stores which could dispense these drugs. Control of these kinds may actually be detrimental to the interests of both patients and providers since â€Å"they impose one-size prescriptions in an area of science that is marked by variation." Further, it could be said that "...solutions to any of the health care problems that government is trying to mitigate will not rest in Washingtons constraining fixes but with [medical organizations] working with agencies to promote practice standards and safety measures that do not sacrifice medical autonomy and patient choice." (Kaiser, 2007). The Bill or Rights is an important step towards seeking social equality and fairness in medical treatment. Under this it is possible for patients to â€Å"sue for injury resulting from denial of care.† (Hashimoto, 2001). However, much as this bill may appear to professs equality and protect underprivileged class interests, it fails to acquire implementation value since the poorer sectors are not included since it does not cover the poorer sections of society who are covered under Medicaid. Thus it is setting its sights on citizens who seek private medical care. Therefore,