1.1.2 - Enthalpy (H)
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Practice Questions
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What is enthalpy?
💡 Hint: Consider its relation to internal energy and pressure.
Define an exothermic reaction.
💡 Hint: Think about heat flow in the context of surroundings.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does a negative ΔH indicate about a chemical reaction?
💡 Hint: Think about the flow of heat in relation to the surroundings.
True or False: All endothermic reactions have a positive ΔH.
💡 Hint: Consider how heat interacts with the system.
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Challenge Problems
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If the standard enthalpy of combustion of a compound is -600 kJ/mol, how much energy would be released when 2 moles of this compound are burned?
💡 Hint: Multiply the enthalpy change by the number of moles.
Using Hess's Law, if the enthalpy change for a reaction A → B is -50 kJ and for B → C is -30 kJ, what is the total enthalpy change for A → C?
💡 Hint: Sum the individual enthalpy changes together.
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