2. (a) Consider the energy level diagram below
This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
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Here are the solutions to the questions:
2. (a) Consider the energy level diagram below
The overall reaction shown is the atomization of liquid phosphorus trichloride:
$$ \text{PCl}_3\text{(l)} \to \text{P(g)} + 3\text{Cl(g)} \quad \Delta H = +982 \text{ kJ} $$
We can use Hess's Law by following the steps in the diagram:
1. Reverse of enthalpy of formation of $\text{PCl}_3\text{(l)}$:
$$ \text{PCl}_3\text{(l)} \to \text{P(s)} + \frac{3}{2}\text{Cl}_
