Chemical Reactions And Energy

Question 1

Standard Enthalpy Change of Reaction

Answer 1

The standard enthalpy change of reaction is the enthalpy change when molar quantities of reactants, as stated in the equation , react together under standard conditions to give product.

Question 2

Standard Enthalpy Change of Formation

Answer 2

The enthalpy change when one mole of the substance is formed from its elements in their standard states under standard conditions.