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Ch.6 - Thermochemistry WorksheetSee all chapters

# Thermal Equilibrium

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Sections
Nature of Energy
Kinetic & Potential Energy
First Law of Thermodynamics
Internal Energy
Endothermic & Exothermic Reactions
Heat Capacity
Constant-Pressure Calorimetry
Constant-Volume Calorimetry
Thermal Equilibrium
Thermochemical Equations
Formation Equations
Enthalpy of Formation
Hess's Law

Thermal Equilibrium involves two substances that are in physical contact reaching the same final temperature over time.

###### Thermal Equilibrium Reactions

Concept #1: Thermal Equilibrium

Under non-ideal conditions, calorimeter absorbs some of the heat from the object.

Example #1: If 50 g block of lead at 250 ºC is submerged in a solution at 90 ºC, the final temperature of the solution will be:

Practice: If 53.2 g Al at 120.0 ºC is placed in 110.0 g H2O at 90 ºC within an insulated container that absorbs a negligible amount of heat, what is the final temperature of the aluminum? The specific heat capacities of water and aluminum are 4.184 J/g ∙ ºC and 0.897 J/g ∙ ºC, respectively.