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7. Energy, Rate and Equilibrium - 4! 3부

7. Energy, Rate and Equilibrium / Hess's Law / 문제 11

문제 11

Calculate the overall enthalpy change for A → E using: A → C, ΔH = 60 kJ; C → D, ΔH = -20 kJ; D → E, ΔH = 10 kJ.

A

90 kJ

B

50 kJ

C

-50 kJ

D

30 kJ