An energy cycle relating three species shows the enthalpy changes below: • A → B :…
CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics
Problem
An energy cycle relating three species shows the enthalpy changes below:
• A → B : +85 kJ
• B → C : –130 kJ
• A → C : +15 kJ
Which step in the cycle is most endothermic?
(a) B → C
(b) The enthalpy change is the same for all three steps.
(c) A → B
(d) A → C