What is the activation energy Ea for this reaction?
Answer in units of kJ
The deltaH is 160 kJ
X is at 160 (beginning of reaction)
Y is at 300 (end of reaction)
This is tough without a diagram but I assume X and Y are just that; i.e., beginning and end. Ignoring signs,
I believe delta E = 300-160 = ? and it's an endothermic reaction.
Then Ea reverse = 300-160 = ?
Ea is the sum of Ea reverse and delta E, again ignoring signs.