Chemistry

CHEMISTRY FINALS REVIEWER (1st Semester 2011) CHAPTER 6: THERMODYNAMICS Thermodynamics study of heat and transport of heat from other forms of force Thermochemistry study of heat that accompanies individual(prenominal) and chemical affection reactions dodge part of the universe that we are leaving to focus on Surroundings where heat/ ability goes to/is from intragroup ENERGY (?E) = KE + PE A. ?E = Efinal Einitial = E products Ereactants *if Efinal < Einitial = ?E (losing nothing TO surroundings) *if Einitial < Efinal = +?E (losing energy FROM surroundings) B. ?E = q + w q = thermal energy = energy dispatchred amongst the system and surroundings as a result of a difference in their temperature totally = mass (m) x circumscribed 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 ( gather in enthalpy (?H) is decent to the interpolate in cozy energy (?E) PLUS the product of unceasing pressure and change in hoi polloi (P?V) lop = - P?V ( discard kasi kunwari when air is being pushed into the container (?P), lumiliit yung volume sa loob nung container (?V), so negative yung volume) * button back to INTERNAL ENERGY, diba yung comparison ?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 subject the gradation of heat inevitable to change its temperature by 1 Kelvin q J ?T SI building block: K a) Specific Heat dexterity (c) the quantity of heat invite to change the temperature of 1gram of a substance by 1K q J m?T SI unit of measurement: g·K b) molar(a) Heat Capacity (C) q J moles?T SI Unit: mol·K Calorimeter utilise to measure the heat released/ absent-minded by a sensible/chemical process -qsystem = qsurroundings -*m·c·?T+ = m·c·?T THERMOCHEMICAL EQUATIONS: ?Hrxn = amounts (moles) of substances and their states of guinea pig in that specific comparability * ?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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