2/28/2013 Introduction: Hess ’s law is a terminology in chemistry named after Germain Hess‚ a Swiss-born Russian chemist and physician who published it in 1840. The law states that the total enthalpy change during the complete course of a reaction is the same whether the reaction is made in one step or in several steps. Enthalpy cannot be directly measured‚ but rather the change in enthalpy. Enthalpy is described as the change in kinetic and thermal energy. Hess’s law states that the enthalpy change
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Taha Al-Yousif Hooke’s Law Lab Date conducted: September 18th 2013 Partners: Mohammed‚ Liam‚ Ben Nguyen Purpose: The purpose of this experiment is to find the relationship between the stretch of the spring and the attached mass and to verify that this relationship is accurately described by Hook’s Law. Theory: Hooke’s Law states that to extend a spring by an amount (Stretch) from its previous position‚ one needs to add an external force (Mass). Therefore
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The drinking age law is a law that is greatly debated. There are many pros and con to the drinking age being lowered. At the age of 18 you are considered an adult in the eyes of the public. Many think a young adult is not mature enough to have a sip of beer but somehow is old enough to fight for our country. The drinking age should be lowered because an individual is considered an adult at the age of 18‚ laws about drinking can be more harmful the good‚ and if you are able to all these adult things
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solution (KOH(aq))‚ is required to neutralize 25.0 cm3 of 0.200 mol dm–3 aqueous sulfuric acid‚ (H2SO4(aq))? A. 12.5 cm3 B. 25.0 cm3 C. 50.0 cm3 D. 75.0 cm3 4. The temperature in Kelvin of 1.0 dm3 of an ideal gas is doubled and its pressure is tripled. What is the final volume of the gas in dm3? A. B. C. D. 5. What volume of 0.500 mol dm–3 sulfuric acid solution is required to react completely with 10.0 g of calcium carbonate according to the equation below? CaCO3(s) + H2SO4(aq)
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Name: Section: SP1L-17 Date: 2/26/11 Coulomb’s Law: What is the charge on a charged pith ball? Experimental Determination of the Electrostatic Force acting between two charged pith balls Equipment: a pvc pipe and fur or wool‚ a metric ruler‚ a protractor‚ two pith balls on a stand as in figure 1. Your teacher will tell you the mass of your pith balls. Procedure: Make sure the strings of your two pith balls are untangled as in figure 1. Make sure that the pith balls are neutral by rubbing
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Two-Shaft Gas Turbine 1st Law Demonstration Lab Report CCTD101B THE UNIVERSITY OF TRINIDAD & TOBAGO FOR: MR REAN MAHARAJ March 25‚ 2012 Authored by: Odia Pollard (55628) 1 Contents AIM ................................................................................................................................................................ 2 METHOD..............................................................................................................................................
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number‚ the country has available supply of food source. The enormous amount grains will provide the necessity and needs of the country. However‚ what happens with the plant body the grain was took off? What do farmers do to the bigger tons of rice straw left? Is burning the most effective and efficient solution? Does it pose any threat on the environment? Open burning of agricultural waste is a common means of disposing crops and wood waste and for clearing land for farming. In rice‚ the most common
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Charles’s Law – Lab Report Charles’ Law: Assuming that pressure remains constant‚ the volume and absolute temperature of a certain quantity of a gas are directly proportional. Mathematically‚ this can be represented as: Temperature = Constant x Volume or Volume = Constant x Temperature or Volume/Temperature = Constant Substituting in variables‚ the formula is: V/T=K Because the formula is equal to a constant‚ it is possible to solve for a change in volume or temperature using a proportion
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Introduction The purpose of this experiment was to determine the rate law graphically from the rate of disappearance and the x y values also the specific rate constant (k). Activation energy was also determined‚ and the effect of catalyst was evaluated in the reaction between peroxodisulphate ion S2O82-‚ and iodide ion‚ I-. S2O82-(aq) + 3 I-(aq) --> 2 SO42-(aq) + I3(aq) The general expression for the rate law‚ given this overall reaction‚ is: rate of disappearance of S2O82- = k[S2O82-]m[I-]n
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Senior School STUDENT NAME: _______________________________________ GRADE 11 TEACHER: ______________________________ Date submitted: ____________ IB Chemistry TOPIC 1: Stoichiometric Relationships SUB TOPIC: Gas Laws ASSESSMENT TASK Laboratory Report INVESTIGATION: Investigating the Relationship Between Pressure and Volume Using Data Loggers YEAR 11 IB Chemistry ASSESSMENT CRITERIA The result for this Assessment Task will contribute to your A – E grade for the semester
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