Entropy: Entropy is a measure of the disorder of a system. Entropy comes from the second law of thermodynamics‚ which states that all systems tend to reach a state of equilibrium. The significance of entropy is that when a spontaneous change occurs in a system‚ it will always be found that if the total entropy change for everything involved is calculated‚ a positive value will be obtained. Simply‚ all spontaneous changes in an isolated chemical system occur with an increase in entropy. Like enthalpy
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Marie Alessandra T. Reyes Group 4 18L Quantitative Determination of the Acidity of Soft Drinks I. Introduction Soft drinks are well known beverages among the young that are consumed mostly for pleasure. These beverages normally contain flavoring‚ sweeteners coloring‚ carbonic acid and acids. Carbonic acid and acids play an important part in the formulation of soft drinks. They enhance the flavor and give a pleasant refreshing ’lift ’ to the drink. The type of acid used can even affect the palatability
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Jahzeel Morales AP Chemistry December 12‚ 2014 Determination of the Molar Mass of Volatile Liquids Theory: Molar masses‚ can be seen and used daily in chemistry. In this lab‚ the ideal gas law helps determine and evaluate the molar mass of gases and volatile liquids. The ideal gas law compares four properties of a gas which include pressure‚ volume‚ moles‚ and temperature. During this experiment‚ the moles would be unknown‚ in effect the student must use a substance mass divided by its molar mass
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1 Class XII: Chemistry Chapter 1: The Solid State Concept 1. Solid: Solid is a state of matter in which the constituting particles are arranged very closely. The constituent particles can be atoms‚ molecules or ions. Properties of solids: a. They have definite mass‚ volume and shape. b. Intermolecular distances are short and hence the intermolecular forces are strong. c. Their constituent particles have fixed positions and can only oscillate about their mean positions. d. They are incompressible
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• The equilibrium law DYNAMIC EQUILIBRIUM forward A +8 reaction ""r=====~’~ reverse reaction Most chemical reactions do not go to completion. Once some products are formed the reverse reaction can take place to reform the reactants. In a closed system the concentrations of all the reactants and products will eventually become constant. Such a system is said to be in a state of dynamic equilibrium. The forward and reverse reactions continue to occur‚ but at equilibrium
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The Great Answer Author Details Charles Fulton Ouster was born on Jan. 22‚ 1893‚ in Baltimore‚ Md. He studied law but turned to journalism‚ working as a reporter and then as an arts critic for the Baltimore American while also contributing to magazines. In 1923 he became editor of Metropolitan magazine‚ and from 1931 to 1942 he edited Liberty magazine. He accepted the position of senior editor at Reader’s Digest in 1944. While working as an editor‚ Ouster also pursued a parallel career in writing
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Psychology Revision | Unit 1 and Unit 2 | | | Damien Edwards | | | | Cognitive Approach Craik and Tulving (1975) Aim – To test the Levels of Processing theory‚ and see if words processed semantically had better recall than words processed phonetically or structurally. Results – 17% recall for structural‚ 36% for phonetic and 65% for semantic processing. Conclusion – The deeper the level of processing‚ the stronger the memory‚ while shallow processing produces weak memory
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leader who is high in both concern for people and concern for production would rate ________. Answer Selected Answer: (9‚9) Correct Answer: (9‚9) • Question 2 1 out of 1 points Recent studies indicate that this measure of ability is the best predictor of who will be a leader in an organisation. Answer Selected Answer: Emotional intelligence. Correct Answer: Emotional intelligence. • Question 3 1 out of 1 points A team ’s ________
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Akhenaten’s experiment with monotheism failed because Answer | A. | it could not compete with Christianity. | | B. | it did not gain the support of the pharaoh. | | C. | the hated and corrupt priesthood endorsed it. | | D. | it had no connection with the Egyptian past. | | E. | its elaborate ritual was too confusing. | Question 2 Mesopotamian agriculture depended on Answer | A. | irrigation. | | B. | slavery. | | C. | the regular flooding of the Nile. | | D. |
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oxygen and sulfur. This substance cannot be a(n) Your Answer: | element. | | | An element cannot be broken down into other elements. | | 2. | | Pick the chemical change that occurs when a lit match is held under a piece of metal. Your Answer: | match burns | | | Chemical changes‚ which release heat and light‚ occur during the combustion process. | | 3. | | Which identification is incorrect for the elements listed? Your Answer: | Zn‚ zirconium | | | Zn is zinc; Zr is zirconium
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