How much energy is required to decompose 765 g of PCl₃ according to the reaction below? The molar mass of PCl₃ is 137.32 g mol^-1 and may be useful. 4PCl₃(g)→ P₄(s)+ 6Cl₂(g)Δ_rH° = +1207 kJ

Question

Quizplus · Accepted Answer

First, calculate the moles of PCl₃: 765 g / 137.32 g/mol = 5.57 mol. The reaction shows that 4 moles of PCl₃ require 1207 kJ. Therefore, 5.57 moles require (5.57 mol / 4 mol) × 1207 kJ = 1680 kJ, which is approximately 1.68 × 10³ kJ.

How Much Energy Is Required to Decompose 765 G of PCl3

How Much Energy Is Required to Decompose 765 G of PCl₃