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4 cards from this section. Quick, good the night before a test.
What are the standard conditions for measuring enthalpy?
Think about pressure, temperature, and concentration.
What does ΔH° represent?
Look for the symbol representing enthalpy changes.
What pressure corresponds to standard conditions?
Remember, 1 atmosphere is approximately 100 kPa.
True or False: The standard enthalpy of formation for an element in its standard state is zero.
Consider the definition of formation in chemistry.
Given that the enthalpy change for the complete combustion of ethane (C₂H₆) is -1560 kJ/mol, calculate the energy released for the combustion of 3 moles of ethane.
Multiply the moles by the enthalpy change for complete combustion.
If the enthalpy of formation of water is -285.8 kJ/mol, calculate the total enthalpy change when 4 moles of water are formed under standard conditions.
Remember the enthalpy of formation value is negative for water.
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