How much energy is required to decompose 612 g of PCl₃,according to the reaction below? The molar mass of PCl₃ is 137.32 g/mol and may be useful.
4 PCl₃(g) → P₄(s) + 6 Cl₂(g) ΔH°_rxn = +1207 kJ

Question

Quizplus · Accepted Answer

First, we need to calculate the number of moles of PCl₃: n = 612 g / 137.32 g/mol = 4.45 mol Next, we can use the given equation to calculate the amount of energy required: ΔH°_rxn = (1207 kJ / 4 mol) x 4.45 mol = 5336.15 kJ So the answer is D, 1.34 × 10³ kJ (rounded to two significant figures).

How Much Energy Is Required to Decompose 612 G of PCl3,according

How Much Energy Is Required to Decompose 612 G of PCl₃,according