H2SO4: Liquid, mp = 3.0 °C (98%); 10 °C (100%); bp = 338 °C (98%); 330 °C (100%); VP = < 0.0001 kPa @ 20 °C H3PO4: Solid (often used in an aqueous solution), mp = 42.4 °C; bp = 158 °C; vp = 0.0038 kPa @ 20 °C
H2SO4: Liquid, mp = 3.0 °C (98%); 10 °C (100%); bp = 338°C (98%); 330 °C (100%); VP = < 0.0001 kPa @20 °CH3PO4: Solid (often used in an aqueous solution), mp = 42.4°C; bp = 158 °C; vp = 0.0038 kPa @ 20 °C