ER01a Thermochemistry.pdf - THERMOCHEMISTRY ↗ MATTER ENERGY ENTHALPY ↗ THERMOCHEMISTRY is the study of the energy changes that accompany physical

ER01a Thermochemistry.pdf - THERMOCHEMISTRY ↗ MATTER...

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± ±²³´µ¶·²³µ¸¹±´º
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µ»±±³´, ³¼³´½º, & ³¼±²»¾¿º 552T°±330R&&))&²°±&&³441S552T330R>>;Y is the study of the energy GJGchanges that aGJGcGJGcompany physiGJGcal, GJGchemiGJGcal, and nuGJGclear GJGchanges in matter. (±ranGJGch of 252ThermodynamiGJGcs) 9<9When studying GJGchanges in energy, we need to distinguish FIFbetween 441S>>;Y441S552T±&&441S and the 441S663U330R330R))&663U''$´³''$µ441S ² 441S>>;Y441S552T±&& is the part of the universe we have GJGchosen to study at a given moment
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¹º¹±³µ ²hemiJJGcal 441System: a set of reaGJGctants and produGJGcts under study. 552Types of 441Systems: &)&pen 141System: IIFboth matter and energy JJGcan move in or out ³losed 141System: energy JJGcan move in or out, IIFbut not matter °solated 141System: an ideal system in whiJJGch neither matter nor energy JJGcan move in or out 441Surroundings – all matter around the system that is GJGcapaFIFble of aFIFbsorFIFbing or releasing thermal energy (the rest of the universe)
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³¼±²»¾¿º ±nthalpy ( & ): 252The enthalpy of a suFIFbstanGJGce refers to how muGJGch energy is GJGcontained in a suFIFbstanGJGce at GJGconstant pressure. ±`nt\UH^lpy wHs ZSor_mUNr^ly ]k`now`n Hs \UUNHt Qo`ntUN`nt. 663Units of ±nergy: JJGcalories or ¶oules
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À¼¸±¹ ¶oule ( $ ), kilo¶oule (k¶) 252The joule is the energy required to exert a forGJGce of 1 $'$ewton for 1 metre. 1 ´oule = 1 $'$·m = 1 kg·m 2 /s 2 1 k´ = 1000 ´ Lj more fun JJGcalorie (JJGcal), kiloJJGcalorie (kJJGcal): &)&ne GJGcalorie is the quantity of heat required to raise the temperature of 1 gram of liquid water 1°³.
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  • Fall '16
  • Maheshwari
  • Chemistry, Hess Law, Thermochem

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