4.1.3 - Standard conditions
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Practice Questions
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What are the standard conditions for measuring enthalpy?
💡 Hint: Think about pressure, temperature, and concentration.
What does ΔH° represent?
💡 Hint: Look for the symbol representing enthalpy changes.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What pressure corresponds to standard conditions?
💡 Hint: Remember, 1 atmosphere is approximately 100 kPa.
True or False: The standard enthalpy of formation for an element in its standard state is zero.
💡 Hint: Consider the definition of formation in chemistry.
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Challenge Problems
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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.
💡 Hint: 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.
💡 Hint: Remember the enthalpy of formation value is negative for water.
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