20.0 cm3 of sulfuric acid, concentration 0.30 mol/dm, was added to 40 cm3 of sodium hydroxide, concentration 0.20 mol/dm3 Please answer this question clearly and step by step

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

what is the question here. i think you messed up.