To which one of the following reactions occurring at 25°C does the symbol deltaH°f[H2SO4(l)] refer
You have not included the reaction.
The symbol deltaH°f[H2SO4(l)] refers to the standard enthalpy of formation of sulfuric acid (H2SO4) in its liquid state at 25°C.
The symbol deltaH°f[H2SO4(l)] refers to the standard enthalpy change of formation of sulfuric acid (H2SO4) in its liquid state at 25°C. The standard enthalpy change of formation, denoted as deltaH°f, is the amount of heat absorbed or released when one mole of a compound is formed from its constituent elements in their standard states.
To find the answer to your question, you can consult a table or database that provides standard enthalpy of formation values for various compounds. Such tables are commonly found in textbooks, reference books, or online databases.
In the table or database, locate the entry for sulfuric acid (H2SO4). Check the provided value for the standard enthalpy of formation (usually expressed in kJ/mol) under the specified conditions, which in this case is 25°C or 298 K.
Remember that the standard enthalpy of formation is specific to the physical state of the compound (in this case, liquid) and the temperature specified (25°C).