Question

what is the heat of reaction or δh in this energy diagram (in kj)? reaction pathway 20 -20 40 60

Explanation:

Step1: Identify reactant and product energy

The energy of reactants is 60 kJ and the energy of products is 40 kJ.

Step2: Calculate heat of reaction formula

The heat of reaction $\Delta H$ is given by $\Delta H=H_{products}-H_{reactants}$.

Step3: Substitute values

$\Delta H = 40 - 60=- 20$ kJ.

Answer:

-20