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CHEMISTRY 11 Ch 9 Reactions NAME____________________ Mr. Bellman Practice problems wkst 4 ( 11-16 ) Date______________Bk_____

4. Draw an energy diagram having ΔH = + 25 kJ. 5. Draw an energy diagram having ΔH = -50 kJ. 6. ΔH = -50 kJ for the reaction: F G. Re-write this equation to show the 50 kJ of energy in the reaction equation. 7. If a reaction absorbs 30 kJ of heat, what is the ΔH for the reaction? 8. If P Q + 25 kJ, what is the ΔH for the reaction? Which have more energy, the reactants or products? Answers on the back

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