Chemistry

CHEMISTRY FINALS REVIEWER (1st Semester 2011) CHAPTER 6: THERMODYNAMICS Thermodynamics study of kindle and enthral of foment from other forms of competency Thermochemistry study of heat that accompanies own(prenominal) and chemical substance reactions System part of the universe that we be leaving to focus on Surroundings where heat/ goose egg goes to/is from intragroup ENERGY (?E) = KE + PE A. ?E = Efinal Einitial = Eproducts Ereactants *if Efinal < Einitial = ?E (losing postal code TO surroundings) *if Einitial < Efinal = +?E (losing energy FROM surroundings) B. ?E = q + w q = thermal energy = energy deepenred amongst the system and surroundings as a result of a difference in their temperature only = mass (m) x finicky heat capacity (c) x transplant in temperature (?T) = m·c·?T w = work/energy transfer = work exerted when an object is moved by force = F·d IF WORK IS DONE IN GASEOUS SYSTEMS: ?H = ?E + P?V ( tack in heat content (?H) is equal to the chan ge in internal energy (?E) confident(p) the product of unceasing pressure and change in intensity (P?V) Work = - P?V ( ostracize kasi kunwari when air is macrocosm pushed into the container (?P), lumiliit yung volume sa loob nung container (?V), so negative yung volume) *going back to familiar ENERGY, diba yung equation ?E = q + w, you female genital organ stand in w with P?V so magiging ?E = q P?V.

pag trinanspose and stuff, magiging q = ?E + P?V or q = ?H hotness Capacity the gradation of heat required to change its temperature by 1 Kelvin q J ?T SI building block: K a) Specific Heat Capacity (c) the qu antity of heat require to change the tempera! ture of 1gram of a substance by 1K q J m?T SI Unit: g·K b) Molar Heat Capacity (C) q J moles?T SI Unit: mol·K Calorimeter used to measure the heat released/absorbed by a physical/chemical performance -qsystem = qsurroundings -*m·c·?T+ = m·c·?T THERMOCHEMICAL EQUATIONS: ?Hrxn = amounts (moles) of substances and their states of matter in that specific equation * ?H is (-) when it is energy-releasing (release heat) *?H is (+) when it is...If you want to get a wide essay, holy order it on our website: OrderCustomPaper.com

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