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2 cards from this section. Quick, good the night before a test.
What is the standard pressure used to define standard state conditions?
Think about the pressure context relative to earlier conventions.
What does ΔH_f° signify?
Look at the definition of formation.
What is the standard pressure used in thermochemistry?
Consider current conventions in scientific reporting.
True or False: ΔH_f° for an element in its standard state is zero.
Think about what formation entails.
Given the following enthalpy values, calculate the ΔH_rxn° for the combustion of butane: C₄H₁₀ + 13/2 O₂ → 4 CO₂ + 5 H₂O.
Be mindful of the stoichiometric coefficients while calculating.
How does changing the temperature from 298.15 K to 350 K affect the standard enthalpy of a reaction? Discuss the implications on ΔH and spontaneity.
Think about how temperature relates to enthalpy changes and Gibbs Free Energy.
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