Does anyone have data for the heat of formation of sulphuric acid as a function of mass fraction H2SO4 in water ie not just for aqueous or liquid but in between too?

Data for the heat of formation of sulfuric acid (H₂SO₄) as a function of mass fraction in water is not typically available in standard references, as it is usually reported for concentrated or dilute solutions. However, calorimetric studies can provide insights into the thermodynamic properties of H₂SO₄ solutions at various concentrations. For precise values, experimental data or specialized thermodynamic models may need to be consulted, as these can vary significantly with concentration. Research literature focusing on solution thermodynamics may have relevant findings.