I thought you inherited your money. Essays - Daisy, Kernel Panic

I thought you inherited your money." "I did, old sport," he said automatically, "but I lost most of it in the big panic the panic of the war. I think he hardly knew what he was saying, for when I asked him what business he was in he answered, "That's my affair," before he realized that it wasn't the appropriate reply. "Oh, I've been in several things," he corrected himself. "I was in the drug business and then I was in the oil business. But I'm not in either one now." With enchanting murmurs Daisy admired this aspect or that of the feudal silhouette against the sky, admired the gardens, the sparkling odor of jonquils And inside, as we wandered through Marie Antoinette music-rooms and Restoration salons, I felt that there were guests concealed behind every couch and table, under orders to be breathlessly silent until we had passed through His bedroom was the simplest room of all except where the dresser was garnished with a toilet set of pure dull gold.

Coffee Cup and Bomb Calorimetry

Coffee Cup and Bomb Calorimetry A calorimeter is a device used to measure the quantity of heat flow in a chemical reaction. Two of the most common types of calorimeters are the coffee cup calorimeter and the bomb calorimeter. Coffee Cup Calorimeter A coffee cup calorimeter is essentially a polystyrene (Styrofoam) cup with a lid. The cup is partially filled with a known volume of water and a thermometer is inserted through the lid of the cup so that its bulb is below the water surface. When a chemical reaction occurs in the coffee cup calorimeter, the heat of the reaction is absorbed by the water. The change in water temperature is used to calculate the amount of heat that has been absorbed (used to make products, so water temperature decreases) or evolved (lost to the water, so its temperature increases) in the reaction. Heat flow is calculated using the relation: q (specific heat) x m x Δt Where q is heat flow, m is mass in grams, and Δt is the change in temperature. The specific heat is the amount of heat required to raise the temperature of 1 gram of a substance 1 degree Celsius. The specific heat of water is 4.18 J/(g ·Ã‚ °C). For example, consider a chemical reaction that occurs in 200 grams of water with an initial temperature of 25.0 C. The reaction is allowed to proceed in the coffee cup calorimeter. As a result of the reaction, the temperature of the water changes to 31.0 C. The heat flow is calculated: qwater 4.18 J/(g ·Ã‚ °C) x 200 g x (31.0 C - 25.0 C) qwater 5.0 x 103 J The products of the reaction evolved 5,000 J of heat, which was lost to the water. The enthalpy change, ΔH, for the reaction is equal in magnitude but opposite in sign to the heat flow for the water: ΔHreaction -(qwater) Recall that for an exothermic reaction, ΔH 0, qwater is positive. The water absorbs heat from the reaction and an increase in temperature is seen. For an endothermic reaction, ΔH 0, qwater is negative. The water supplies heat for the reaction and a decrease in temperature is seen. Bomb Calorimeter A coffee cup calorimeter is great for measuring heat flow in a solution, but it cant be used for reactions that involve gases since they would escape from the cup. The coffee cup calorimeter cant be used for high-temperature reactions, either, because they would melt the cup. A bomb calorimeter is used to measure heat flows for gases and ​high-temperature reactions. A bomb calorimeter works in the same manner as a coffee cup calorimeter, with one big difference: In a coffee cup calorimeter, the reaction takes place in the water, while in a bomb calorimeter, the reaction takes place in a sealed metal container, which is placed in the water in an insulated container. Heat flow from the reaction crosses the walls of the sealed container to the water. The temperature difference of the water is measured, just as it was for a coffee cup calorimeter. Analysis of the heat flow is a bit more complex than it was for the coffee cup calorimeter because the heat flow into the metal parts of the calorimeter must be taken into account: qreaction - (qwater qbomb) where qwater 4.18 J/(g ·Ã‚ °C) x mwater x Δt The bomb has a fixed mass and specific heat. The mass of the bomb multiplied by its specific heat is sometimes termed the calorimeter constant, denoted by the symbol C with units of joules per degree Celsius. The calorimeter constant is determined experimentally and will vary from one calorimeter to the next. The heat flow of the bomb is: qbomb C x Δt Once the calorimeter constant is known, calculating heat flow is a simple matter. The pressure within a bomb calorimeter often changes during a reaction, so the heat flow may not be equal in magnitude to the enthalpy change.

International Human resource management Essay Example | Topics and Well Written Essays - 2750 words - 1

International Human resource management - Essay Example The enterprises that are able to effectively manage the human resources are the ones that are capable of competing well in the dynamic global market. Scholz & Zentes (2009) points out that even with the increased awareness on the global trends, multinationals are still having a lot of problems in expatriation and repatriation processes. This is basically as a result of the fact that the different countries in which such organizations are operating has diverse factors and concerns that determine how effective and profitable a business will be. The factors may be economical, political, social, legal, technological and social. One of the main areas of concern is on the pay and conditions of the employment (Ferner & Quintanilla, 2001). Multinationals rely on two management approaches in the global arena to manage employees. They are the standardization and the adaptation approaches. The multinationals which use the standardized model of operations employ similar strictures for the employee remuneration and conditions of employment in all their areas of operations. The standardized structure is aimed at streamlining all the operations of the business in the various markets and regions where it is operating in. Hilton Hotel is one of the corporations which uses this approach in all its branches worldwide. Ferner & Almond (2004) notes that adaptation, on the other hand, entails restructuring the human resources operations and approaches so that they conform to the prevailing conditions in the market or country where an enterprise is operating in. Such businesses, therefore, consider the various social, political, economic and cultural factors that may affect their human resource operations and integrate them in their operations. Aguilera (2004) adds each of these approaches has its own pros and cons. Despite this being the case, multinationals