When ethene is treated in a calorimeter with H2 and a Pt catalyst, the heat of reaction...

When ethene is treated in a calorimeter with H₂ and a Pt catalyst, the heat of reaction is found to be -137 kJ/mol ( -32.7 kcal/mol), and the reaction goes to completion. When the reaction takes place at 1400 °K,

the equilibrium is found to be evenly balanced, with K_eq = 1. Compute the value of for this reaction.