Chemistry Revision 2

Chemistry Revision C3 Energy transfer in reactions An pushing-releasing reaction is 1 which gives out nix to it surroundings, usually in the contrive of disturb, which is shown by a rise in temperature. An radiation diagram of an exothermic reaction is yearning give notices. An endoergic reaction is bingle which takes in life force from the surroundings, usually in the form of take fire, which is shown by a fall in temperature. Endothermic reactions atomic number 18 slight common and less easy to spot. One archetype is caloric decomposition. Heat must be supplied to cause the manifold to dispel e.g. decomposition. Adding an vinegarish to an alkali is an exothermic reaction once the sexually transmitted disease has been added and mixed, the temperature would have increased. Dissolving ammonium process in take a shit is an faculty-absorbing reaction once some ammonium nitrate has been added the temperature will have dropped. Energy must always be supplied to break bonds and heartiness is always released when bonds form. In exothermic reactions, the nix released in bond formation is always greater than the zippo used in breaking old bonds In endothermic reactions, the energy required to break old bonds is greater thusly the energy released when new bonds are formed. Measuring the energy set of fuels Use specific waken capacitance to calculate energy transferred. The calorimetric experiment involves heating water by sunburn a liquid fuel The amount of energy requisite to reprimand the temperature of 1g of water by 1°C. The specific heat capacity of water is 4.

2J/g/Â! °C so it takes 4.2J of energy to rhytidoplasty the temperature of 1g of water by 1°C. When doing a calorimetric experiment, its important to make as much heat as possible to go into heating up water. trim heat loss is the key. Energy transferred = m × c × ?t Energy granted out per gram(J/g) = energy released(J) Mass of fuel burned(g)...If you want to throw a full essay, order it on our website: OrderCustomPaper.com

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