CHEM 203 Midterm: Vocabulary Terms MT1
1 Nov 2016
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Document Summary
Internal energy energy needed to create the system from atoms, contains. Ke of motion and electrostatic energy, state function. Enthalpy sum of a system"s internal energy and the product of. Standard h of formation pressure & volume, state function. Change in enthalpy when compounds formed from elements in standard states (usually -) Thermodynamics study of enthalpy changes in chemical reactions, concerned with equilibrium states (relationships) and not how fast something happens/numbers. State function macroscopic properties whose change depends only on the initial and final states, not path taken. Heat capacity amount heat required to raise t of substance by 1 k. Specific heat capacity (extensive) measure of how much heat syst. can hold. Amount heat per unit mass required to raise temperature of substance by 1k (intensive) System part that interests us, interacts with surroundings. Open system both matter and energy can be exchanged. Closed system energy can be exchanged, but not matter.
