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A brief overview of changes in the superconducting transition temperatureunder pressure and evolution of specific heat capacity jump at Tc for tworelated families of iron - based superconductors, Ba{1-x}KxFe2As2 (0.2 < x <1.0) and Ba{1-x}NaxFe2As2 (0.2 < x < 0.9) will be given. For Ba{1-x}KxFe2As2the specific heat capacity jump at Tc measured over the whole extent of thesuperconducting dome shows clear deviation from the empirical, Delta Cp (Tc) ~Tc^3, scaling (known as the BNC scaling) for x > 0.7. At the sameconcentrations range apparent equivalence of effects of pressure and K-substitution on Tc fails. These observations suggests a significant change ofthe superconducting state for x > 0.7. In contrast, the data for the largeportion of Ba{1-x}NaxFe2As2 (0.2 < x < 0.9) series follow the BNC scaling.However, the pressure dependence of Tc (measured up to ~ 12 kbar) have clearnon-linearities for Na concentration in 0.2 - 0.25 region, that may beconsistent with Tc crossing the phase boundaries of the emergent, narrow,antiferromagnetic/tetragonal phase. Results will be discussed in context otherstudies of these two and related families of iron-based superconductors.

Superconductivity In K- And Na- Doped Bafe2as2: What Can We Learn From Heat Capacity And Pressure Dependence of Tc