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2 cards from this section. Quick, good the night before a test.
What does a negative 1H indicate?
Think about heat exchange in that reaction.
Define a thermochemical equation.
It involves both reactants and energy.
What does a positive 1H signify in a chemical reaction?
Think about whether the system is taking in or giving out energy.
True or False: Hess's Law can be applied to calculate enthalpy changes for reactions occurring in multiple steps.
Remember how you can break down tasks to find total effort.
Calculate the enthalpy change for the reaction when burning 1 mole of propane (C3H8) if the 1H is given as -1040 kJ/mol. Write the thermochemical equation.
Focus on the reaction's products and energy release.
Apply Hess's Law to find the enthalpy change for the reaction: A → B with 1H1 = -50 kJ and B → C with 1H2 = 70 kJ. What is the enthalpy for A → C?
Remember to add the heats based on the direction of each step.
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