Question

The value of delta at 25c for the formation of pocl3.

Answer 1

°ΔG rxn = -1108.7

Further explanation

Maybe the question is like this

the value of ΔG° at 25 °C for the formation of POCl₃

Reaction

P₂(g)+O₂(g)+3Cl₂(g)⇒2POCl₃(g)

Formula

`\tt ^o\Delta G_(rxn)=^o\Delta G_f~product-^o\Delta G_f~reactants`

You can find table to find ΔG° at 25 °C(298 K)

°ΔG POCl₃ = -502.5 kJ/mol

°ΔG O₂ and °ΔG Cl₂ = 0

°ΔG P₂ = 103.7 kJ/mol

`\tt ^o\Delta G_(rxn)=2.^o\Delta G~POCl_3-^o\Delta GP_2\\\\^\Delta G_(rxn)=2.(-502.5)-103.7=-1108.7~kJ/mol`