Question

Which of the following is not true regarding thermochemical equations?

• A. The coefficients in a balanced thermo-chemical equation refer to the number of moles of reactants and products involved in the reaction
• B. The coefficients in a balanced thermo-chemical equation refer to the number of molecules of reactants and products involved in the reaction
• C. The numerical value of $\Delta_{ r } H$ refers to the number of moles of substances specified by an equation.
• D. Standard enthalpy change $\Delta_{ r } H ^{\ominus}$ will have units as $kJ\, mol ^{-1}$.

Answer 1

Answer: (B)

The coefficients in a balanced thermo-chemical equation refer to the number of moles (not to molecules) of reactants and products involved in the reaction.