The activation energy (Ea) for the reaction 2N2O(g) → 2N2(g) + O2(g) ΔH
o
= −164 kJ/mol

is 300.0 kJ/mol. What is the (Ea) for the reverse reaction?

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)