Question

Which of the following equations can be used to determine the change in enthalpy of a system? A. `DeltaH_"reaction"=DeltaH_"products"×DeltaH_"reactants"` B. `DeltaH_"reaction"=DeltaH_"products"÷DeltaH_"reactants"` C. `DeltaH_"reaction"= DeltaH_"products"+DeltaH_"reactants"` D. `DeltaH_"reaction" = DeltaH_"products"−DeltaH_"reactants"`

Answer 1

`DeltaH_"reaction" = DeltaH_"products"−DeltaH_"reactants"`

Step-by-step explanation:

Plato

Answer 2

Answer: The correct answer is Option D.

Step-by-step explanation:

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as
`\Delta H^o`

The equation used to calculate enthalpy change is of a reaction is:

`\Delta H^o_(rxn)=\sum [n* \Delta H^o_f_((product))]-\sum [n* \Delta H^o_f_((reactant))]`

Hence, the correct answer is Option D.