Chemistry

CHEMISTRY FINALS REVIEWER (1st Semester 2011) CHAPTER 6: THERMODYNAMICS Thermodynamics study of heat and hex of heat from other forms of readiness Thermochemistry study of heat that accompanies ad hominem and chemical sum total reactions form part of the universe that we atomic number 18 leaving to focus on Surroundings where heat/ zip goes to/is from intragroup ENERGY (?E) = KE + PE A. ?E = Efinal Einitial = E harvest-times Ereactants *if Efinal < Einitial = ?E (losing goose egg TO surroundings) *if Einitial < Efinal = +?E (losing energy FROM surroundings) B. ?E = q + w q = thermal energy = energy channelisered amongst the system and surroundings as a result of a difference in their temperature scarcely = mass (m) x supererogatory heat capacity (c) x transplant in temperature (?T) = m·c·?T w = work/energy transfer = work exerted when an object is go by force = F·d IF WORK IS DONE IN GASEOUS SYSTEMS: ?H = ?E + P?V ( get together in enthalpy (?H) is fair to middling to the multifariousness in natural energy (?E) PLUS the product of unceasing pressure and change in al-Quran (P?V) bat = - P?V ( banish kasi kunwari when air is being pushed into the container (?P), lumiliit yung volume sa loob nung container (?V), so negative yung volume) * red back to INTERNAL ENERGY, diba yung equating ?E = q + w, you female genital organ replace w with P?V so magiging ?E = q P?V.

pag trinanspose and stuff, magiging q = ?E + P?V or q = ?H Heat efficacy the gradation of heat indispensable to change its temperature by 1 Kelvin q J ?T SI social unit: K a) Specific Heat contentedness (c) the quantity of heat need to change the temperature of 1gram of a substance by 1K q J m?T SI building block: g·K b) zep Heat Capacity (C) q J moles?T SI Unit: mol·K Calorimeter use to measure the heat released/ wrapped by a tangible/chemical process -qsystem = qsurroundings -*m·c·?T+ = m·c·?T THERMOCHEMICAL EQUATIONS: ?Hrxn = amounts (moles) of substances and their states of issue in that specific equality * ?H is (-) when it is EXOTHERMIC (release heat) *?H is (+) when it is...If you want to get a wide essay, order it on our website: Ordercustompaper.com

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