# Chem1ACh6

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1. Energy (symbol and definition)
• E - anything that has the capacity to do work
• (Quantity that an object can posess)
2. Work (symbol and definition)
• W - a force acting over a distance
• W = force x distance
• (way an onject can exchange E w/ other objects [in and out])
3. Heat (symbol and definition)
• q - flow of energy caused by a difference in temperature
• (way an onject can exchange E w/ other objects [in and out])
4. Types of energy w/ description
• Kinetic - energy of motion OR energy being transfered
• Thermal - energy with temperature (a form of Kinetic energy)
• Potential - energy stored in an object OR energy associated with composition/position of object
5. cal, Cal, Joule, Kilojoule, and Killowatt-hour (kWh)
• 1 cal = 4.184 J
• 1 Cal = 4184 J
• 1 KJ = 1000 J
• 1 kWh = 3.60 x 106
6. Joule definition
Amount of E needed to move a 1Kg mass 1 meter
7. calorie definition
Amount of E needed to raise 1g H2O 1 °C
8. Change in Internal E formula
• ΔE = q + W
• W = -PΔV
• q = Cs x Mass x ΔT
9. Heat Capacity (symbol and definition)
• C - amount of energy required to change an objects temperature by 1 degree C
• Depends on amount of substance
10. Specific Heat (symbol and definition)
• Cs - amount of energy required to raise the temperature of 1g substance by 1 °C
• Depends on type of substance (fixed amount)
11. System/surroundings heat relationship
• qsystem=-qsurroundings
• qrxn=-qsol
12. Bomb calorimeter details + formulas
• Constant volume
• Measures ΔE
• qreaction=-qcalorimeter=-CcalorimeterxΔT
• qreaction=-qcalorimeter-qH2O
13. Coffee cup calorimeter details + formula
• Constant pressure
• Measures ΔH
• qreaction=-qsolution=-Cs x Masss x ΔTs
14. Enthalpy (symbol and definition) + equations
• H - total energy of a system (internal E + work) / determines endo/exothermic
• H = E + PV
• ΔH = ΔE + PΔV
• ΔH = q (@ constant P)
15. Standard Conditions (thermodynamics) + symbol
• symbol = °
• gas = 1 atm pressure
• liquid/solid = 1 atm pressure, 25°C
• solution = 1M concentration
16. Standard Enthalpy of formation (symbol + meaning)?
• ΔHf° - enthalpy change for the reaction forming exactly one mole of a pure compound from its constituent elements at standard conditions
• ΔHf° of elements is always - KJ/mol
17. Standard enthalpy change (symbol + meaning + equation)
• ΔH° - enthalpy change when all reactants an products are in their standard states
• ΔH°reaction = ΣnΔHf°(products) - ΣnΔHf°(reactants)
• where n is the cefficient in the reaction

## Card Set Information

 Author: victimsofadown ID: 74787 Filename: Chem1ACh6 Updated: 2011-04-07 01:13:41 Tags: Chem1ACh6 Folders: Description: Chem1ACh6 Show Answers:

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