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3 cards from this section. Quick, good the night before a test.
Define enthalpy.
Think about heat content related to pressure.
What does it mean if a reaction is exothermic?
Remember the heat flow direction.
What is the enthalpy change for an exothermic reaction?
Consider the heat flow direction.
True or False: Standard enthalpy of formation for an element in its standard state is zero.
Think about formation and its relation to enthalpy.
Given the following reaction: C(graphite) + O₂(g) → CO₂(g), calculate the standard enthalpy change if ΔH_f°(C(graphite)) = 0 kJ mol⁻¹ and ΔH_f°(O₂(g)) = 0 kJ mol⁻¹, and ΔH_f°(CO₂(g)) = -393.5 kJ mol⁻¹.
Use the enthalpy of formation values provided.
If a calorimeter reads an initial temperature of 20°C and after a reaction, it reads 25°C with 100g of water, how much heat was absorbed?
Convert between different units if necessary.
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